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Code Girls: The Untold Story of the American Women Code Breakers of World War II Kindle Edition
Recruited by the U.S. Army and Navy from small towns and elite colleges, more than ten thousand women served as codebreakers during World War II. While their brothers and boyfriends took up arms, these women moved to Washington and learned the meticulous work of code-breaking. Their efforts shortened the war, saved countless lives, and gave them access to careers previously denied to them. A strict vow of secrecy nearly erased their efforts from history; now, through dazzling research and interviews with surviving code girls, bestselling author Liza Mundy brings to life this riveting and vital story of American courage, service, and scientific accomplishment.
- LanguageEnglish
- PublisherLegacy Lit
- Publication dateOctober 10, 2017
- File size34.6 MB

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From the Publisher
Editorial Reviews
Review
Code Girls is not just a great slice of history-one that would have been lost to us without Liza's storytelling and the work of some heroic archivists-but a story relevant to every discussion we have now about America's security agencies and how they came to be. I am delighted readers will finally know about these pioneering women and their incredible contributions to America.
-- "Gayle Tzemach Lemmon, New York Times bestselling author"Indispensable and fascinating history. Highly recommended for all readers.
-- "Library Journal (starred review)"Prodigiously researched and engrossing.
-- "New York Times Book Review"Erin Bennett splendidly narrates this account...[and] sounds like a natural in all aspects of her narration. Her voice is pleasing to the ear, clear in pronunciation, and suitably expressive. She makes what is doubtless a well-scripted reading seem effortless and unrehearsed.
-- "AudioFile"Superbly researched and stirringly written social history of a pivotal chapter in the struggle for women's rights, told through the powerful and poignant stories of the individuals involved. In exploring the vast, obscure, and makeshift offices of wartime Washington where these women performed seemingly impossible deeds, Mundy has discovered a birthplace of modern America.
-- "Glenn Frankel, Pulitzer Prize-winning author"Fascinating...Addictively readable.
-- "Boston Globe"Code Girls is a riveting account of the thousands of young coeds who flooded into Washington to help America win World War II. Liza Mundy has written a thrilling page-turner that illuminates the patriotism, rivalry, and sexism of the code-breakers' world.
-- "Lynn Povich, author of The Good Girls Revolt"Code Girls reveals a hidden army of female cryptographers, whose work played a crucial role in ending World War II. With clarity and insight, Mundy exposes the intertwined narratives of the women who broke codes and the burgeoning field of military intelligence in the 1940s. I cannot overstate the importance of this book; Mundy has rescued a piece of forgotten history, and given these American heroes the recognition they deserve.
-- "Nathalia Holt, author of Rise of the Rocket Girls"Code Girls is an extraordinary book by an extraordinary author. Liza Mundy's portraits of World War II codebreakers are so skillfully and vividly drawn that I felt as if I were right there with them-mastering ciphers, outwitting the Japanese army, sinking ships, breaking hearts, and even accidentally insulting Eleanor Roosevelt. I am an evangelist for this book: You must read it.
-- "Karen Abbott, New York Times bestselling author"Mundy is a fine storyteller...A sleek, compelling narrative...The book is a winner. Her descriptions of codes and ciphers, how they worked and how they were broken, are remarkably clear and accessible. A well-researched, compellingly written, crucial addition to the literature of American involvement in World War II.
-- "Kirkus Reviews (starred review)"Mundy unveils the untold story of a very important part of American History that otherwise would have been kept secret.
-- "Kansas City Star"About the Author
Erin Bennett is an Earphones Award-winning narrator and a stage actress who played Carlie Roberts in the BBC radio drama Torchwood: Submission. She can be heard on several video games. Regional theater appearances include the Intiman, Pasadena Playhouse, Arizona Theatre Company, A Noise Within, Laguna Playhouse, and the Getty Villa. She trained at Boston University and the London Academy of Music and Dramatic Art.
Liza Mundy is a staff writer at the Washington Post and the bestselling author of Michelle: A Biography and Everything Conceivable, among other works. She received her AB degree from Princeton University and earned an MA in English literature at the University of Virginia. She has won awards for essays, profiles, and science writing from the Sunday Magazine Editors Association, the Maryland-Delaware-DC Press Association, the American Association of Sunday and Feature Editors, The Missouri Lifestyle Journalism Awards, and the Gay and Lesbian Alliance Against Defamation. She was a 2003 Kaiser Foundation Media Fellow and a 2005 Media Fellow at the Marine Biological Laboratory in Woods Hole, Massachusetts.
Product details
- ASIN : B01N193KET
- Publisher : Legacy Lit; Illustrated edition (October 10, 2017)
- Publication date : October 10, 2017
- Language : English
- File size : 34.6 MB
- Text-to-Speech : Enabled
- Screen Reader : Supported
- Enhanced typesetting : Enabled
- X-Ray : Enabled
- Word Wise : Enabled
- Print length : 433 pages
- Page numbers source ISBN : 0316352535
- Best Sellers Rank: #97,054 in Kindle Store (See Top 100 in Kindle Store)
- #48 in Intelligence & Espionage (Kindle Store)
- #193 in History eBooks of Women
- #239 in World War II History (Kindle Store)
- Customer Reviews:
About the author

Liza Mundy is an award-winning journalist and the New York Times bestselling author of five books, including CODE GIRLS, and her latest, THE SISTERHOOD.
Published in 2017, CODE GIRLS tells the story of more than 10,000 female code breakers recruited during World War II to perform work that saved countless lives, shortened a global war, and pioneered the modern computer and cybersecurity industries.
Available October 2023, THE SISTERHOOD is a gripping history of women in the CIA across three generations--beginning with unlikely female spies who served in the war and its aftermath, through to the women who tracked down Osama Bin Laden.
Her other titles include MICHELLE: A BIOGRAPHY; THE RICHER SEX; and EVERYTHING CONCEIVABLE.
In addition to her work as a narrative non-fiction author, Liza, a former staff writer for The Washington Post, writes about history, culture, and politics for publications such as The Atlantic and Politico.
At various points in her life as a working parent she has worked full-time, part-time, all-night, at home, in the office, remotely, in person, on trains, in the car, alone, in crowds, under duress, and while simultaneously making dinner.
Customer reviews
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Learn more how customers reviews work on AmazonCustomers say
Customers find the story fascinating and well-written. They describe the book as an interesting, engrossing read that is worth their time. The information provided is informative and well-researched. Readers appreciate the female perspective and the strong women involved in code breaking. The book provides new insights into a secretive society while also teaching about ciphers.
AI-generated from the text of customer reviews
Customers enjoy the story quality. They find the narrative engaging and well-written, with a compelling topic and insights. The introduction and epilogue are well-crafted, while the bulk of the narrative is gripping and rich in American social and military history.
"...Author Liza Mundy weaves a number of narrative strands...." Read more
"...to the early 1940s — before, during and after WWII — and tells a fascinating story of how many talented American women worked so hard to break the..." Read more
"...There are so many aspects to Code Girls: personal stories, World War II history, backstory for code breaking in the 20th Century, what it actually..." Read more
"...This book is entertaining in so many ways. It lets us peek into this secretive society while also trying to teach us about ciphers and methods used...." Read more
Customers find the book engaging and worth reading. They describe it as an engrossing story and praise the author's writing style. The book is described as an enjoyable companion and an excellent historical account of the founding of the United States.
"...to learn and do as much as possible, as fast as possible, and work as hard as possible...." Read more
"...They were patriotic, hard working and trustworthy. My aunt never told her family what she did during the war. She took an oath and kept her word...." Read more
"This was the book chosen for our neighborhood book club and WOW, just wow! What a wonderful read. :)..." Read more
"...went over my head a bit mathematically speaking, but it’s such a good read it wasn’t really an issue...." Read more
Customers find the book informative and well-researched. They appreciate the insights it provides and the thorough research done by the author. The book's end helps bring everything together more personally for them.
"...This breakthrough gave the U. S. strategic and long term intelligence that saved thousands of lives...." Read more
"...Although the premise of this book is an interesting and necessary one, the execution suffers from some weaknesses...." Read more
"...codebreaking during World War 2, but this book really gave me a much better understanding, particularly the important role played by American women..." Read more
"...am deeply impressed by the book's organization, by the years of research that Mundy invested, and by the thoughtful writing style at both the..." Read more
Customers like the female perspective of the book. They find it a good way to immortalize amazing women and smart women who overcame obstacles. The book tells stories of young, college-educated women, many of them teachers. It shines a light on women who deserve recognition for their efforts during WWII.
"...They were patriotic, hard working and trustworthy. My aunt never told her family what she did during the war. She took an oath and kept her word...." Read more
"...She focuses on a handful of women and on the important breakthroughs...." Read more
"...This book really shines a light on women who deserve recognition for their contribution to the war effort...." Read more
"...This is not a novel, it is the true story of women who couldn't tell anyone what they were doing!" Read more
Customers enjoy the storyline about code breakers in America during the war. They find the history fascinating and enjoyable to read about the women involved in code breaking. The book provides an absorbing account of code breaking and its role in the U.S. military. While some find the subject interesting, others feel the author goes into too much detail.
"...There are so many aspects to Code Girls: personal stories, World War II history, backstory for code breaking in the 20th Century, what it actually..." Read more
"...It becomes incredibly clear upon reading that the brilliance of women code breakers was absolutely, unquestionably instrumental in the Allies'..." Read more
"...code breakers of 1942-45 is assembled with more than the facts of successful code-breaking...." Read more
"...book and it opens up a world we seldom hear of - these code breaker gals were marvelous and saved many lives...." Read more
Customers enjoy the book's secret content. They find it compelling and informative, with personal details and a peek into a secretive society. The book provides historical information and teaches about cryptography. Many readers appreciate the codebreakers' commitment to secrecy and say the book is very personal for them as their aunt was in the WACS during WW II.
"...There are so many aspects to Code Girls: personal stories, World War II history, backstory for code breaking in the 20th Century, what it actually..." Read more
"...This book is entertaining in so many ways. It lets us peek into this secretive society while also trying to teach us about ciphers and methods used...." Read more
"...Highly recommend if you enjoy non-fiction, history about World War 2, and/or books that celebrate the achievements of women...." Read more
"...I think the most amazing thing is how committed they were to keeping their work secret - integrity at its finest.. We live in a world where there..." Read more
Customers enjoy the variety of characters in the book. They find the characters realistic and human, bringing to life the personalities of those involved in history. The book brings the emotional and personal experiences of these women to life.
"...the end that put faces to the people I was reading about just made more personable...." Read more
"...Well written, fun, full of characters (real people) with whom you will fall in love...." Read more
"...I also found much of it to be repetitive. The characters often overlapped and I thought perhaps I needed a program to keep track of them, Part of..." Read more
"...and expertly written despite complex details and number of characters in historical record." Read more
Customers have mixed opinions about the writing quality. Some find the story engaging and well-told, with an easy-to-read narrative. However, others feel the book is not well organized for beginners, gets technical at times, and becomes repetitive.
"...They aren’t too technical and will give you an appreciation of how difficult and tedious the job can be. One of their earliest triumphs..." Read more
"...It's mind boggling! I'm thankful and appreciative of the women who served in such humble but heroic capacities...." Read more
"...the historical context for both sides, there is a fair amount of repeated information...." Read more
"...The introduction and epilogue were both compelling and well written, but the bulk of the narrative in between is largely rambling and disorganized...." Read more
Top reviews from the United States
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- Reviewed in the United States on December 25, 2017I heard about Code Girls several months before publication, and was determined to read it as soon as possible. My mother was one of the code breakers at Arlington Hall, a largely civilian group of women who worked under the auspices of the US Army. She fit the typical profile of Arlington Hall recruits: a teacher who left her job at a girls’ boarding school in Virginia to not only serve her country, but do more exciting and challenging work than was available to most women in peacetime. (The military recruited heavily for women with four-year degrees, which were rare at the time but required for teachers.) Arlington Hall was a place where a woman could fulfill her intellectual potential, where she was encouraged to learn and do as much as possible, as fast as possible, and work as hard as possible. The code breakers’ work was crucial to winning the war.
According to this book, the women worked for seven days straight, with their eighth “off” day spent on shopping, errands, and probably housework as well. However, my mother did not mind the long hours. On her commute from Washington, she even ran into Eleanor Roosevelt one morning around 6; Roosevelt said she took early walks to evade the Secret Service. Like other women in this book, my mother roomed with another woman who was also a code breaker and who became a close friend, and she enjoyed the camaraderie of her whole code-breaking group.
Author Liza Mundy weaves a number of narrative strands. She discusses the work done at not only Arlington Hall, but at the separate Navy code-breaking facility (where most code breakers were WAVES) and at Sugar Camp. Sugar Camp was an NCR rustic retreat outside Dayton, Ohio used in peacetime to train salesmen; during the war it housed WAVES who wired the bombes that NCR manufactured to break the German Enigma codes. Mundy gives as much technical detail on code breaking as the average, nonspecialist reader can probably handle. This includes work done during World War 1 and between the wars. Some World War 1 code breakers carried right on into World War 2.
I was disappointed that almost all the World War 2 information focuses on the Japanese codes. It’s true that the Japanese codes were extremely challenging. They were complex, the Japanese used several different codes, and the codes were changed constantly. It was hard to find Americans who knew Japanese. The code breakers were given some basic relevant vocabulary. Then--Mundy mentions only in passing, late in the book--the decoded messages were passed to translators, many of them missionaries or children of missionaries who had lived in Japan. Mundy also mentions somewhere that the messages of many other countries were decoded at Arlington Hall. (I’d assume this was also true of the Navy facility.) But that’s all she says. The organization of the code-breaking facilities seems to have been complex, with people working in many different groups for both efficiency and secrecy. I gained little sense of the overall organization or what the groups were. I have no idea what my mother worked on, but my guess is messages in French. She had a BA in French, she was fluent in French, and I’d assume Vichy France was pumping out messages at the same phenomenal rate as other countries.
Mundy may have focused primarily on the Japanese code-breaking group due to her choice to tell the personal stories of a number of code breakers, especially Dorothy (Dot) Braden, now Dorothy Braden Bruce. Dot worked in a Japanese group and Mundy interviewed her extensively for this book. Dot’s personal life included her close friendship with her roommate, code breaker Ruth Weston; Dot’s on-off engagement to a soldier named George Rush; and Dot’s postwar marriage to another soldier named Jim Bruce. Dot also had brothers in the war. In between handling all that coded text, Dot and other code breakers wrote huge numbers of letters, to husbands, fiancés, brothers, even soldiers they’d never met who wanted pen pals. The workforce was mostly female—my mother said there was only one man in her group, an elderly Egyptologist who had worked on cracking hieroglyphics. But the code breakers’ lives were full of men, to the extent that (Mundy relates) pregnancies were not uncommon among unmarried women at Arlington Hall. (The Navy was much tighter and required even married pregnant women to quit work.) I can’t help wondering whether my 30-ish mother was also feverishly writing to soldiers and dating numerous men when they were on leave. Certainly not my father—they did not meet till after the war and in any case, he was rejected by the draft due to a medical condition.
Although Mundy goes back and forth between code-breaking organizations and various personal stories, she manages to move through the war narrative more or less chronologically. Her descriptions of military and naval action are mostly focused on the end of the war, especially the excitements of D-Day and the Japanese surrender. My mother said that two of her coworkers always joked that “by the end of the war they’d be cutting out paper dolls.” When my mother and others came in after their day off, they discovered those two coworkers had spent that day making paper dolls, using every scrap of paper they’d saved up, and had hung the dolls all over the office. Mundy mentions that people danced in the streets of Washington.
However relieved the women code breakers were, their immediate experiences were not altogether joyous. The Arlington Hall workers were given a speech encouraging them all to quit work as soon as possible. Most did, at least after they married or had a child. (A few did stay into the Cold War and beyond.) The US mounted a reverse recruitment campaign, telling all women it was their patriotic duty to turn over their jobs to returning men. Women married the fiancés they’d been corresponding with and proceeded to have babies. Some were happy housewives; some were not. Many, including my mother, missed the sense of challenge and purpose they’d had as code breakers, and went back to work. After the war my mother got a graduate degree in mathematics, which my father (a physicist) never understood. Her verbal skills were so much stronger, he said; why was she determined to study mathematics? But mathematics was needed and valued at Arlington Hall, and many women did not discover their aptitude for it until they worked there. My mother waited till her children were old enough, then spent the rest of her career as a college math professor. Most of the code breakers still alive are now in assisted living facilities. It’s good that Mundy interviewed some, because they were told their work was top secret and should never, ever be revealed. Many revealed nothing substantive while they were alive, including my mother, though it was clearly one of the happiest times of her life.
When I was 12 or 13, my mother sat me down and taught me the rudiments of code breaking. This was just the beginning, she said; the work at Arlington Hall was much harder. What she was teaching me was not classified. But I should learn something about breaking codes, because I’d never know when I might need to.
- Reviewed in the United States on January 22, 2018Liza Mundy takes us back to the early 1940s — before, during and after WWII — and tells a fascinating story of how many talented American women worked so hard to break the communication codes used by the Germans and Japanese. She gives the reader a brief tutorial on the decoding techniques employed by these women such as cribs, overlaps, and additives. They aren’t too technical and will give you an appreciation of how difficult and tedious the job can be.
One of their earliest triumphs occurred in September 1940 when Genevieve Grotjan broke the code being used by Japan’s “Purple” encryption machine. This breakthrough gave the U. S. strategic and long term intelligence that saved thousands of lives. For example, many messages were decoded that revealed the intended movement of Admiral Yamamoto’s fleet. Such information contributed greatly to the U. S. Navy’s victory at the battle of Midway.
Many of the women who came to Washington from college campuses became members of our Navy as either enlisted or officers. The women’s part of the Navy had just been created and was called WAVES. It was actually a clever acronym that stood for Women Accepted for Voluntary Emergency Service. To make the job even more attractive to volunteers the Navy enlisted the services of fashion house Mainbocher to design a snappy uniform for the women.
Code breaking was not all of the triumphs won during the war. Prior to the invasion of France in June 1944, the U. S. engaged in a bit of communications trickery. So much fake message traffic was generated that the Germans believed the Allies had three armies ready to attack, one of which was fake and would invade Norway. The idea here was to make sure the Germans didn’t move troops from Norway to France.
Mundy notes that many women code breakers went on to top level positions at the National Security Agency (NSA), the federal agency at Ft. Meade, MD that is responsible for monitoring the communications of all potential threats to our country. Mundy also conducted many interviews of women who served as code breakers, now allowed to tell their stories, to give us a fascinating picture of the long hours they worked to provide an extremely valuable service.
- Reviewed in the United States on October 22, 2017This is a very good read. When all around us now you hear about STEM education and coding and how we need more women engineers, this story shows us that there have always been smart women wanting to use their minds to help the world. There are so many aspects to Code Girls: personal stories, World War II history, backstory for code breaking in the 20th Century, what it actually took to break the codes and how doing this work effected the women doing it. I have heard many tales from my family of that period in America, like planting Victory Gardens here at home, the rationing and men who went off to fight. My mother and grandmother lived in Washington DC during WWII. Mom was in high school and grandmother worked for the Commerce Dept. My uncle fought in Europe and twice escaped from prison camps. When he came home, he met and immediately married my aunt who was in the WAVES, stationed in DC. My uncle didn't speak very much about his time in the war, but my aunt would only say "It was Top Secret" when asked what she did in the service. I'll bet she was a code girl! She had a recent college degree in science and was sent from the midwest to Washington after she joined the WAVES. I enjoyed reading about how the women escaped to have some adventure (and lots of work) in the big city. They were patriotic, hard working and trustworthy. My aunt never told her family what she did during the war. She took an oath and kept her word. Lessons for today! Very interesting. Ms. Mundy has done us all a service with her very readable book. I am also glad to hear that a youth version will be coming out next year. Let's get girls interested in math and science!
Top reviews from other countries
- ninakReviewed in Germany on July 5, 2021
5.0 out of 5 stars Great Read
This is a wonderful book, an untold story until now, well written and very interesting. Enjoyed it very much!
- BadgerReviewed in Canada on June 12, 2019
5.0 out of 5 stars An excellent read
I am really enjoying this book. It has a good style of writing and is not in the least bit dull, as I thought it might be. It describes in depth the huge - and unsung - contribution these young ladies made to winning WWII. It is also a celebration of women who rose to a challenge and achieved independence and huge respect along the way.
- Client d'AmazonReviewed in the United Kingdom on February 11, 2019
5.0 out of 5 stars A great book. Easy and enjoyable to read.
À superb and informative book. Lots of names, dates and detail to absorb. But was easy enough to do so
Thank you Amazon.co.uk for sorting out my 'mis order' so quickly and efficiently.
- Muhammad Nizam Bin MohtarReviewed in Singapore on February 19, 2024
4.0 out of 5 stars A well written book. ⭐️⭐️⭐️⭐️
A well written book. ⭐️⭐️⭐️⭐️
- Emma290497Reviewed in Germany on November 21, 2020
4.0 out of 5 stars The „untold“ story of Amercian women making a difference
I guess I would never have come across this book if it hadn’t been recommended in a read-along in a book forum.
The early 1940s, America „joins“ WW2, men are leaving to fight... and intelligent, weil-educated women with a disposition to solving puzzles enter the war effort ... as code breakers for the Navy and the Army.
Well deserved credit to women who might well have changed the outcome and the length of this war. This book tells their stories, how they came to join the war effort and what happened after - in a time where women where to be house wives - and even the best of them hardly had a chance for a good college / university education and make use of it other than becoming a school teacher.