The most recommended cryptanalysis books

Who picked these books? Meet our 17 experts.

17 authors created a book list connected to cryptanalysis, and here are their favorite cryptanalysis books.
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Book cover of Combined Fleet Decoded: The Secret History of American Intelligence and the Japanese Navy in World War II

Robbyn Swan Author Of A Matter of Honor: Pearl Harbor: Betrayal, Blame and a Family’s Quest For Justice

From my list on American code-breaking in World War II.

Why are we passionate about this?

Anthony Summers and I are the authors of several books that focus on the world of intelligence, including The Eleventh Day: The Full Story of 9/11 and Osama bin Laden- which was a Finalist for the Pulitzer Prize. As we revealed in our most recent book, A Matter of Honor, U.S. code-breaking efforts in World War II began with a colossal failure – Pearl Harbor. According to the first official report on the disaster, the attack “had been clearly foreshadowed” in the Japanese diplomatic traffic the U.S had decoded. The story of how the Americans turned that initial failure into success came to fascinate me.

Robbyn's book list on American code-breaking in World War II

Robbyn Swan Why did Robbyn love this book?

A groundbreaking work of research that is at the same time a page-turning read that sheds new light on the epic battles of the conflict. Prados interweaves the intelligence successes and failures of the U.S. and Japanese combatants in a way that has not previously been attempted. The resulting work adds hugely to our understanding of the war in the Pacific.

By John Prados,

Why should I read it?

1 author picked Combined Fleet Decoded as one of their favorite books, and they share why you should read it.

What is this book about?

The most authoritative and revealing examination yet of the way intelligence--of all kinds--was instrumental in defeating Japan. Prados gives a new picture of the war in the Pacific, one which will challenge many previous conceptions about that conflict, and one which will be irresistible to those readers who find histories of that period fascinating. 16 pages of photos.


Book cover of Battle of Wits: The Complete Story of Codebreaking in World War II

Mark Ciampa Author Of Security Awareness: Applying Practical Security in Your World

From my list on how to break things (encryption, passwords, etc.).

Why am I passionate about this?

I have had the opportunity to write (I have written over 30 college textbooks on technology, most of them in the area of cybersecurity), study (my PhD dissertation was on cybersecurity), teach (I have taught at colleges and universities my entire career about technology, networking, and cybersecurity), and research (I have published numerous peer-reviewed journal articles) on the topic of cybersecurity. But I have always had a soft spot in my heart for the average computer user who struggles with how to protect their technology devices. This has helped drive my passion to focus on practical cybersecurity for everyone.

Mark's book list on how to break things (encryption, passwords, etc.)

Mark Ciampa Why did Mark love this book?

It is hard to underestimate the significance of code breaking during World War II. Without the work of dedicated mathematicians, linguists, and others the great conflicts such as the Battle of Midway and the German U-boat "wolfpacks" that sank over 13 million tons of Allied supplies could have easily been up for grabs. But due to the codebreakers the balance shifted to the Allies. And what is even equally impressive is that the Axis powers never knew that their encoded messages were being read. Stephen Budiansky traces how the codebreakers pulled off this feat while at the same time often battling within their own ranks about who should decode the message, how the messages should be used, and who should get the credit.

By Stephen Budiansky,

Why should I read it?

2 authors picked Battle of Wits as one of their favorite books, and they share why you should read it.

What is this book about?

Drawing from newly declassified documents, the author chronicles the story of codebreaking during the last world war, from cat-and-mouse games with Nazi U-boats to the invasion of Normandy.


Book cover of The Rose Code

Elizabeth Zelvin Author Of Voyage of Strangers

From my list on featuring characters you fall in love with.

Why am I passionate about this?

I’ve always fallen in love with endearing characters. I want to go home with them. For me, the best characters are as real as any other friends. So many good books start with an idyllic situation. Say, a family or group of friends who have strong bonds. Then, someone is killed, or war breaks out. The idyll is smashed so the adventure can begin. I  also like the outsider perspective. The characters have to fight the powers that be. They must have a moral compass. Integrity. Why? I’m a Jewish woman. I was a Girl Scout in the Peace Corps, a poet, a social worker, and a therapist. 

Elizabeth's book list on featuring characters you fall in love with

Elizabeth Zelvin Why did Elizabeth love this book?

This book has so many of my favorite elements: believable friendships among three very different women, Bletchley Park during World War II, with spies, and characters I adored: the debutante, the working-class girl, and the girl we’d now say is “on the spectrum.” I loved this book so much that I read everything Kate Quinn wrote, but this one’s still the best.

When Beth is threatened with a lobotomy, the suspense was terrifying. I kept thinking of my aunt whose existence was a family secret for years. I laughed and cried over this book and the women who helped win the War but had to keep their work a secret, even if it cost them everything and everyone they loved.

By Kate Quinn,

Why should I read it?

11 authors picked The Rose Code as one of their favorite books, and they share why you should read it.

What is this book about?

The New York Times and USA Today bestselling author of The Huntress and The Alice Network returns with another heart-stopping World War II story of three female code breakers at Bletchley Park and the spy they must root out after the war is over.

1940. As England prepares to fight the Nazis, three very different women answer the call to mysterious country estate Bletchley Park, where the best minds in Britain train to break German military codes. Vivacious debutante Osla is the girl who has everything-beauty, wealth, and the dashing Prince Philip of Greece sending her roses-but she burns to…


Book cover of The Girl from Bletchley Park

Gill Thompson Author Of The Child on Platform One

From my list on World War Two featuring strong women.

Why am I passionate about this?

As a teacher, I spent forty years at the chalkface before finally achieving my ambition to be a published writer. My first novel was about a child migrant to Australia; my second about a little girl on the kinder transport. I wanted to write about strong women in world war two. All three of the mothers in my stories are separated from their children and have to make some tough decisions. I hope my readers will remember them for their courage and tenacity and that they’ll enjoy reading about them as much as I’ve enjoyed creating them. 

Gill's book list on World War Two featuring strong women

Gill Thompson Why did Gill love this book?

I’m fascinated by the way the code breakers at Bletchley helped to shorten the war. In Pam, McGurl has created a strong woman, who makes key choices, sometimes at the expense of her own happiness, to support the war effort. But what I really enjoyed was the time slip nature of the novel, where Pam is contrasted to her granddaughter Julia, a modern woman, who, when let down by the men around her, becomes empowered by her own freedom. It’s interesting to see how women’s roles have changed between the 1940s and today. 

By Kathleen McGurl,

Why should I read it?

1 author picked The Girl from Bletchley Park as one of their favorite books, and they share why you should read it.

What is this book about?

The latest unforgettable timeslip novel from the USA Today bestselling author of The Secret of the Chateau.

Will love lead her to a devastating choice?

1942. Three years into the war, Pam turns down her hard-won place at Oxford University to become a codebreaker at Bletchley Park. There, she meets two young men, both keen to impress her, and Pam finds herself falling hard for one of them. But as the country's future becomes more uncertain by the day, a tragic turn of events casts doubt on her choice - and Pam's loyalty is pushed to its limits...

Present day.…


Book cover of Becoming Bulletproof: Life Lessons from a Secret Service Agent

Rayna Flye Author Of Secrets, Lies, and Sneaky Spies

From my list on female codebreakers, agents, and spies.

Why am I passionate about this?

I always wanted to be a spy, but as I scare easily and can’t keep a secret, it was never going to happen. My respect and fascination with the intelligence community has never abated however, and I will never pass up an opportunity to engage with spy-related content. From going to spy museums across the globe to attending lectures to watching the latest entertaining (and totally unrealistic) spy flick, I love it all. I channel that love into writing humorous spy novels that feature fun, fearless females and ripped-from-the-headlines scenarios.  

Rayna's book list on female codebreakers, agents, and spies

Rayna Flye Why did Rayna love this book?

I first heard of Pompouras from her role on a reality TV show Spy Games, but Becoming Bulletproof hooked me with her tale of her time as a Secret Service agent. It’s not a thriller, but don’t tell that to my heart rate as she described her experience of being in New York on 9/11.

I love the way she speaks about the challenges faced as a woman in her field and how she didn’t let the naysayers hold her back. I’ve referred to her book time and time again in my own work both for inspiration, and it’s a great handbook on the tips and tricks of how to read and influence people.  

By Evy Poumpouras,

Why should I read it?

1 author picked Becoming Bulletproof as one of their favorite books, and they share why you should read it.


Book cover of The Codebreakers: The Story Of Secret Writing

Nicholas Reynolds Author Of Need to Know: World War II and the Rise of American Intelligence

From my list on citizen spies building American intelligence in WWII.

Why am I passionate about this?

The defining event in my parents’ lives, World War II has always been in my blood. When I was growing up, it would surface now and again when old comrades came to visit or when we came across souvenirs from the war. My favorite was a carefully etched German map showing sea lanes in the Caribbean, exotic and somehow menacing at the same time. My curiosity piqued, I knew I wanted to be in the thick of history—which meant reading and writing about the war, getting my PhD in history, and becoming a Marine and an intelligence officer.  

Nicholas' book list on citizen spies building American intelligence in WWII

Nicholas Reynolds Why did Nicholas love this book?

David was a pioneer. Before Codebreakers there was next to nothing in print about codebreaking. Focused on World War II, he introduced a generation of readers to a secret realm, inviting us to look behind the big green door for the first time. This generous and loyal friend alerted me to the need for comprehensive overview of American intelligence in World War II.

By David Kahn,

Why should I read it?

2 authors picked The Codebreakers as one of their favorite books, and they share why you should read it.

What is this book about?

Codebreaking is the most important form of secret intelligence in the world. It produces much more and more trustworthy information than spies, and this intelligence exerts great influences upon the policies of governments.


Book cover of The Bletchley Park Codebreakers

Mark Baldwin

From my list on the Enigma Machine and Bletchley Park.

Why am I passionate about this?

Dr. Mark Baldwin – aka Dr. Enigma – is a world expert and speaker on the Enigma machine and has delivered over 700 presentations and demonstrations (using his own, genuine wartime Enigma machine) to some 70,000 people around the world. He has spoken to a wide range of audiences, from cybersecurity experts and software developers at leading Silicon Valley tech companies such as Facebook, Dropbox, and PayPal, to academic audiences at universities, executives at business conferences, and the general public in a couple of hundred one-man theatre shows.

Mark's book list on the Enigma Machine and Bletchley Park

Mark Baldwin Why did Mark love this book?

This anthology is a valuable complement to my first book, with a couple of dozen contributors: a mixture of some who worked at Bletchley Park during the war, and some who are professional historians. The passage of time has encouraged archival research, and allowed historical analysis, producing an authoritative account of Bletchley’s achievements, particularly the breaking of millions of Enigma-enciphered messages.

By Ralph Erskine, Michael Smith,

Why should I read it?

1 author picked The Bletchley Park Codebreakers as one of their favorite books, and they share why you should read it.

What is this book about?

The British codebreakers at Bletchley Park are now believed to have shortened the duration of the Second World War by up to two years. During the dark days of 1941, as Britain stood almost alone against the the Nazis, this remarkable achievement seemed impossible. This extraordinary book, originally published as Action This Day, includes descriptions by some of Britain's foremost historians of the work of Bletchley Park, from the breaking ofEnigma and other wartime codes to the invention of modern computing, and its influence on Cold War codebreaking. Crucially, it features personal reminiscences and very human stories of wartime codebreaking…


Book cover of Spies, Code Breakers, and Secret Agents: A World War II Book for Kids

Barbara Ann Mojica Author Of Little Miss History Travels to Mount Vernon

From my list on for all ages to enjoy.

Why am I passionate about this?

As a parent, grandparent, retired educator, historian, and children’s book author, I am an avid reader and advocate for children’s literacy. My forty years of experience working with children and their families gives me the background and expertise to identify high-quality books and the types of subjects that children will want to read and adults in the family will enjoy sharing with them.

Barbara's book list on for all ages to enjoy

Barbara Ann Mojica Why did Barbara love this book?

Carole P. Roman has hit a home run with this nonfiction book. It paints an intriguing picture of the life of spies during World War II. Roman details the training, weapons, and tools used in spy craft. I found the chapters featuring biographical portraits fascinating. Chef Julia Child and author Graham Greene operated undercover. Roman discusses double agents and the Native Americans who broke the Japanese code. I would recommend this book to children who love adventure, espionage, and history. It’s a perfect read for middle-grade students, but an eye-opener for adults as well.

By Carole P. Roman,

Why should I read it?

1 author picked Spies, Code Breakers, and Secret Agents as one of their favorite books, and they share why you should read it. This book is for kids age 8, 9, 10, and 11.

What is this book about?

Uncover the secret agents of World War 2—an exciting history book for kids 8 to 12

Discover World War 2’s hidden heroes and villains. Spies, Code Breakers, and Secret Agents explores the intriguing world of spycraft and shows you what goes on behind the scenes in war.

From spy schools and ciphers to sneaky tools and secret armies, this guide takes you on a declassified tour of the undercover operations that helped decide the outcome of World War 2. There’s also more than a dozen short spy-ographies that cover some of the most famous (and infamous!) agents that were active…


Book cover of Women in Intelligence: The Hidden History of Two World Wars

Rayna Flye Author Of Secrets, Lies, and Sneaky Spies

From my list on female codebreakers, agents, and spies.

Why am I passionate about this?

I always wanted to be a spy, but as I scare easily and can’t keep a secret, it was never going to happen. My respect and fascination with the intelligence community has never abated however, and I will never pass up an opportunity to engage with spy-related content. From going to spy museums across the globe to attending lectures to watching the latest entertaining (and totally unrealistic) spy flick, I love it all. I channel that love into writing humorous spy novels that feature fun, fearless females and ripped-from-the-headlines scenarios.  

Rayna's book list on female codebreakers, agents, and spies

Rayna Flye Why did Rayna love this book?

Do I judge a book by its cover? Why yes, yes I do! And the moment I saw this gorgeous cover I put it right into my shopping cart, paid full price, and never looked back.

Luckily for me, Women in Intelligence happens to be an excellent book where the content more than matched the expectations I had from the fabulous artwork. Although there are a few familiar faces that appear, most of the women were completely new to me. Not the femme fatales of popular culture; these were patriotic women who often went unseen in the background.

I love that Fry truly delves into uncovering the unsung heroines of WWI and WWII, giving these quiet, determined women a chance to be recognized and to shine.

By Helen Fry,

Why should I read it?

1 author picked Women in Intelligence as one of their favorite books, and they share why you should read it.

What is this book about?

A groundbreaking history of women in British intelligence, revealing their pivotal role across the first half of the twentieth century

From the twentieth century onward, women took on an extraordinary range of roles in intelligence, defying the conventions of their time. Across both world wars, far from being a small part of covert operations, women ran spy networks and escape lines, parachuted behind enemy lines, and interrogated prisoners. And, back in Bletchley and Whitehall, women's vital administrative work in MI offices kept the British war engine running.

In this major, panoramic history, Helen Fry looks at the rich and varied…


Book cover of Code Girls: The Untold Story of the American Women Code Breakers of World War II

Susan E. Lindsey Author Of Liberty Brought Us Here: The True Story of American Slaves Who Migrated to Liberia

From my list on explore history you didn’t know.

Why am I passionate about this?

I write historical nonfiction, I’m an avid reader, and I’ve long been fascinated by the past. But I’m far less interested in the stories of powerful people, political intrigues, and significant battles. I would rather read (and write) hidden history: the stories that have not yet been discovered or fully explored and stories that are left out of history books—accidentally or deliberately. I find these far more compelling. They often provide a deeper look at how history affects those who lack power, influence, and money but who nevertheless do remarkable and often heroic things. I live in Portugal and have started working on a new historical nonfiction book.   

Susan's book list on explore history you didn’t know

Susan E. Lindsey Why did Susan love this book?

In 2018, I went to an author reading by Liza Mundy. Deep into researching my own nonfiction book, I was fascinated as Mundy talked about interviewing women who became code breakers in World War II.

The government recruited them from top colleges and universities, looking for women who were gifted in math and music. The women were sworn to secrecy and kept their word, telling people they had been secretaries during the war. They maintained that fiction into their old age or their graves.

Mundy tracked down survivors and showed them documentation that the program had been declassified. They had been released from their vow of silence and could share their stories with her. The book is excellent.

By Liza Mundy,

Why should I read it?

3 authors picked Code Girls as one of their favorite books, and they share why you should read it.

What is this book about?

An expert on East European politics and economics analyzes and evaluates Western policies toward the new East European democracies as they struggle to build stable political orders and functioning market economies. He argues that the West must give higher priority to assisting the region and reorient its strategies so as to emphasize the political and administrative dimensions of economic reconstruction. He reviews the economic legacy of past Western policies and of Eastern Europe's previous dependency on the Soviet Union, and then examines in detail the changing East-West trade patterns, the prospect for Western investment and technology transfer, the questions of…