The most recommended books about the Enigma machine

Who picked these books? Meet our 16 experts.

16 authors created a book list connected to the Enigma machine, and here are their favorite Enigma machine books.
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Book cover of X Y & Z: The Real Story of How Enigma Was Broken

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?

The brilliance of the Bletchley Park codebreakers is undoubted, but it must be remembered that they did not start from scratch; they built on the work of the cryptanalysts of the Polish Cipher Bureau, who had first broken Enigma ciphers in 1932, and then passed on all their knowledge to Britain in 1939, before the war began. The tentative and suspicious negotiations between Poland, France and the UK were convoluted and lengthy. Alan Turing’s nephew conducted ground-breaking research in archives in the UK, France, Germany, Poland and the USA to compile this unrivalled account of those early days.

By Dermot Turing,

Why should I read it?

1 author picked X Y & Z as one of their favorite books, and they share why you should read it.

What is this book about?

December, 1932
In the bathroom of a Belgian hotel, a French spymaster photographs top-secret documents - the operating instructions of the cipher machine, Enigma. A few weeks later a mathematician in Warsaw begins to decipher the coded communications of the Third Reich and lays the foundations for the code-breaking operation at Bletchley Park. The co-operation between France, Britain and Poland is given the cover-name 'X, Y & Z'.
December, 1942
It is the middle of World War Two. The Polish code-breakers have risked their lives to continue their work inside Vichy France, even as an uncertain future faces their homeland.…


Book cover of Behind the Enigma: The Authorized History of Gchq, Britain's Secret Cyber-Intelligence Agency

Helen Fry Author Of Mi9: A History of the Secret Service for Escape and Evasion in World War Two

From my list on intelligence and espionage.

Why am I passionate about this?

Historian Dr. Helen Fry has written numerous books on the Second World War with particular reference to the 10,000 Germans who fought for Britain, and also British intelligence, espionage and WWII. She is the author of the bestselling book The Walls have Ears: The Greatest Intelligence Operation of WWII which was one of the Daily Mail’s top 8 Books of the Year for War. She has written over 25 books – including The London Cage about London’s secret WWII Interrogation Centre. Her latest book is MI9: The British Secret Service for Escape & Evasion in WWII – the first history of MI9 for 40 years. Helen has appeared in numerous TV documentaries, including David Jason’s Secret Service, Spying on Hitler’s Army, and Home Front Heroes on BBC1. Helen is an ambassador for the Museum of Military Intelligence, and President of the Friends of the National Archives. 


Helen's book list on intelligence and espionage

Helen Fry Why did Helen love this book?

This is the long-anticipated authorized history of GCHQ, one of Britain’s most top-secret intelligence agencies that was published in 2020. John Ferris was granted rare access to the majority of the archives at GCHQ headquarters in Cheltenham.  This volume of over 800 pages provides an open assessment of the crucial role of GCHQ in the most important defining moments of the 20th and 21st centuries; from the codebreakers of the First World War, to breaking of the German Enigma codes in the Second World War, and to contemporary times with the betrayal by whistleblower Edward Snowdon in 2013. Ferris has not been tempted to glamourize GCHQ’s contribution and legacy but provides an honest account that acknowledges that much intelligence work can be laborious. But this does not deflect from the agency’s achievements and fascinating history.

By John Ferris,

Why should I read it?

1 author picked Behind the Enigma as one of their favorite books, and they share why you should read it.

What is this book about?

You know about MI5. You know about MI6. Now discover the untold stories behind Britain's most secretive intelligence agency, in the first ever authorised history of GCHQ. For a hundred years, GCHQ - Government Communications Headquarters - has been at the forefront of innovation in national security and British secret statecraft. Famed for its codebreaking achievements during the Second World War, and essential to the Allied victory, GCHQ also held a critical role in both the Falklands War and Cold War. Today, amidst the growing threats of terrorism and online crime, GCHQ continues to be the UK's leading intelligence, security…


Book cover of Delusions of Intelligence: Enigma, Ultra, and the End of Secure Ciphers

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?

At my presentations, I am so often asked ‘Didn’t the Germans know the Allies had broken Enigma?’ and ‘Did Germany have something like Bletchley Park?’ This book answers questions like these, and shows, in particular, the unjustified faith the Germans had in the Enigma machine. Believing its ciphers to be unbreakable, they failed to spot evidence of its weaknesses and vulnerability.

By R.A. Ratcliff,

Why should I read it?

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

What is this book about?

In 1974, the British government admitted that its WWII secret intelligence organization had read Germany's ciphers on a massive scale. The intelligence from these decrypts influenced the Atlantic, the Eastern Front and Normandy. Why did the Germans never realize the Allies had so thoroughly penetrated their communications? As German intelligence experts conducted numerous internal investigations that all certified their ciphers' security, the Allies continued to break more ciphers and plugged their own communication leaks. How were the Allies able to so thoroughly exploit Germany's secret messages? How did they keep their tremendous success a secret? What flaws in Germany's organization…


Book cover of The Boundaries of Babel: The Brain and the Enigma of Impossible Languages

Asya Pereltsvaig Author Of Languages of the World: An Introduction

From my list on how human language works.

Why am I passionate about this?

I’ve been fascinated by languages since my teenage years, when, in addition to my native Russian, I learned English, French, Spanish, Latin, Hebrew, and Esperanto to varying degrees of fluency. But it was in college that I decided to pursue linguistics as a profession, in part influenced by one of the books on my list! After 20 years of doing scientific research and teaching linguistics at different universities, I switched gears and now focus on bringing linguistic science to the general audience of lifelong learners. Even if you don’t change your career, like I did, I hope you enjoy reading the books on my list as much as I have!  

Asya's book list on how human language works

Asya Pereltsvaig Why did Asya love this book?

I couldn’t put down this book from the very first pages that tell the story of Monsieur Leborgne and how Doctor Broca, who treated him, made the vital linguistic discovery that immortalized his name.

I learned that some groundbreaking linguistic discoveries are still made in hospitals, but one no longer needs to have a brain injury to be of interest to neurolinguistic science.

I also loved discovering how clever experiments are designed and how MRI gives us a window into how language works in the brain in real-time. 

Book cover of The Theory That Would Not Die: How Bayes' Rule Cracked the Enigma Code, Hunted Down Russian Submarines, and Emerged Triumphant from Two Centuries of Controversy

Bastiaan C. van Fraassen Author Of Philosophy and Science of Risk: An Introduction

From my list on exploring the meaning of probability and risk.

Why am I passionate about this?

I’ve wanted to be a philosopher since I read Plato’s Phaedo when I was 17, a new immigrant in Canada. Since then, I’ve been fascinated with time, space, and quantum mechanics and involved in the great debates about their mysteries. I saw probability coming into play more and more in curious roles both in the sciences and in practical life. These five books led me on an exciting journey into the history of probability, the meaning of risk, and the use of probability to assess the possibility of harm. I was gripped, entertained, illuminated, and often amazed at what I was discovering. 

Bastiaan's book list on exploring the meaning of probability and risk

Bastiaan C. van Fraassen Why did Bastiaan love this book?

Can you love a book that you disagree with? I do! I love this extravagant account of how Bayesian Statistics was enmired in controversy and, after 200 years, saved everything from Western Civilization to Captain Dreyfus.

I don’t think that Bayesian statistics is the foundation of all rational thought, but I am happy to celebrate all its wonderful achievements. Every page of this book is lively and personal, engrossing, entertaining, masterful…all of that.

By Sharon Bertsch McGrayne,

Why should I read it?

2 authors picked The Theory That Would Not Die as one of their favorite books, and they share why you should read it.

What is this book about?

A New York Times Book Review Editor's Choice: A vivid account of the generations-long dispute over Bayes' rule, one of the greatest breakthroughs in the history of applied mathematics and statistics

"An intellectual romp touching on, among other topics, military ingenuity, the origins of modern epidemiology, and the theological foundation of modern mathematics."-Michael Washburn, Boston Globe

"To have crafted a page-turner out of the history of statistics is an impressive feat. If only lectures at university had been this racy."-David Robson, New Scientist

Bayes' rule appears to be a straightforward, one-line theorem: by updating our initial beliefs with objective new…


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 The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography

Rob Conery Author Of The Imposter's Handbook: A CS Primer for Self-taught Developers

From my list on self-taught programmers.

Why am I passionate about this?

I taught myself to code back in 1994 while working the graveyard shift as a geologist in the environmental industry. My job consisted of sitting in a chair during the dark hours of the night in a shopping center in Stockton, CA, watching another geologist take samples from wells in the parking lot. A friend of mine suggested I learn to code because I liked computers. I don’t mean to make this out to be a “it’s so simple anyone can do it!” You need to have a relentless drive to learn, which is why I wrote my book, The Imposter’s Handbook - as an active step to learning what I didn’t know I didn’t know.

Rob's book list on self-taught programmers

Rob Conery Why did Rob love this book?

This book makes me jealous as the author has an incredible ability to communicate the densest of topics (Cryptography) in an engaging, wonderful way.

It draws you in and you find yourself transported to battlefields and war rooms of the past. I’ve always taken cryptography for granted - I type https into my browser and navigate to a site and all’s well. I know things are reasonably secure - but why?

It turns out that RSA, the algorithm that underpins things like SSL and SSH, is a landmark of human achievement and did something that millennia of mathematicians and scientists could not: provide secure, end-to-end encryption. A wonderful story.

By Simon Singh,

Why should I read it?

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

What is this book about?

In his first book since the bestselling Fermat's Enigma, Simon Singh offers the first sweeping history of encryption, tracing its evolution and revealing the dramatic effects codes have had on wars, nations, and individual lives. From Mary, Queen of Scots, trapped by her own code, to the Navajo Code Talkers who helped the Allies win World War II, to the incredible (and incredibly simple) logisitical breakthrough that made Internet commerce secure, The Code Book tells the story of the most powerful intellectual weapon ever known: secrecy.

Throughout the text are clear technical and mathematical explanations, and portraits of the remarkable…


Book cover of The Woman Who Smashed Codes: A True Story of Love, Spies, and the Unlikely Heroine Who Outwitted America's Enemies

Robert Mazerov Author Of The Last Horseman: A (Mostly) True Story of a Midwestern Housewife, Illegal Gambling, and The Big Race

From Robert's 3 favorite reads in 2023.

Why am I passionate about this?

Author Funny Unexpected Irreverent Honest Great friend

Robert's 3 favorite reads in 2023

Robert Mazerov Why did Robert love this book?

It is so much like my book: A woman who uses her talent to save others at great personal cost to herself.

Smith used her talents to overcome crime bosses and smugglers, then transferred her skills to fight Nazis in the war. She acted in secret to outwit Hitler. The concept is riveting and in parallel to my own story of a woman who uses her particular skills to outwit others.

She didn’t do anything so noble as to save the world from Naziism, but she saved her family, gave her husband his life back, and had a great time doing it.

By Jason Fagone,

Why should I read it?

1 author picked The Woman Who Smashed Codes as one of their favorite books, and they share why you should read it.

What is this book about?

Joining the ranks of Hidden Figures and In the Garden of Beasts, the incredible true story of the greatest codebreaking duo that ever lived, an American woman and her husband who invented the modern science of cryptology together and used it to confront the evils of their time, solving puzzles that unmasked Nazi spies and helped win World War II.

In 1912, at the height of World War I, brilliant Shakespeare expert Elizebeth Smith went to work for an eccentric tycoon on his estate outside Chicago. The tycoon had close ties to the US government, and he soon asked Elizebeth…


Book cover of The Enigma Girls: How Ten Teenagers Broke Ciphers, Kept Secrets, and Helped Win World War II

Marlene Targ Brill Author Of Jane Addams: The Most Dangerous Woman in America

From my list on groundbreaking women in history.

Why am I passionate about this?

As the author of 73 published books, I have four goals for writing. I want to write more women into history, emphasize how everyday activities children accomplish are important, empower young readers, and tell a story that moves readers, either through an emotional response or the knowledge that they can do what whoever I wrote about did. My biographies cover role models who have been groundbreakers in their time and place. Readers can be, too.

Marlene's book list on groundbreaking women in history

Marlene Targ Brill Why did Marlene love this book?

 Today, I’m told to ask a teen—or younger—for help with technology. As war threatened all of Europe in 1941, Great Britain turned to a group of teenage women to break secret Nazi codes. The Brits hid away the teens during an operation at Bletchley Park that was so secret that participants, to this day, can't t talk about what they accomplished.

With Fleming’s strong writing and excellent research, the story of these other groundbreaking women comes alive.

By Candace Fleming,

Why should I read it?

1 author picked The Enigma Girls 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?

From award-winning author Candace
Fleming, comes the powerful and fascinating story of the brave
and dedicated young women who helped turn the tides of World
War II for the Allies, with their hard work and determination at
Bletchley Park.
"You are to report to Station X at Bletchley Park, Buckinghamshire,
in four days time ... That is all you need to know." This was
the terse telegram hundreds of young women throughout the British
Isles received in the spring of 1941, as World War II raged.
As they arrived at Station X, a sprawling mansion in a state of disrepair…


Book cover of Alan Turing: The Enigma

C.A. Farlow Author Of A Quantum Singularity: Book Three in The Nexus Series

From my list on mixing science, fiction, and adventure.

Why am I passionate about this?

I grew up in farm country of central Indiana. But spent my summers on an island in northern Ontario with my grandparents. My grandfather was a self-taught naturalist and shared his love and fascination of the world around us with me. I went on to become a geologist and traveled the globe exploring for natural resources. My love of nature and science is the foundation for the science fiction I write. Whether a proven theory, a fantastical hypothesis, or true science fiction, it’s all based on science fact. It allows everyone to learn about a world built in science fiction which one day may exist in science fact.

C.A.'s book list on mixing science, fiction, and adventure

C.A. Farlow Why did C.A. love this book?

This is a book that is at once a biography, a testament to human genius in the face of imminent danger, and a story of human injustice. Alan Turing had an idea about a ‘universal machine’. A machine, when built at Bletchley Park, allowed the Allies in World War II to crack the German Enigma ciphers. This universal machine laid the foundations for modern computing and all the amazing advances we enjoy today. But at a price for Turing, he fought inner demons about his homosexuality and eventually paid the ultimate price.

I marveled at his genius, cheered his cryptographic successes with each cipher cracked, shouted against the tragedy of his arrest, cried at his untimely death. A death at his own hand at the age of 41. The world lost a genius due to a society’s labelling of homosexuality as a crime.

We still live in this world of…

By Andrew Hodges,

Why should I read it?

6 authors picked Alan Turing as one of their favorite books, and they share why you should read it.

What is this book about?

A NEW YORK TIMES BESTSELLER The official book behind the Academy Award-winning film The Imitation Game, starring Benedict Cumberbatch and Keira Knightley It is only a slight exaggeration to say that the British mathematician Alan Turing (1912-1954) saved the Allies from the Nazis, invented the computer and artificial intelligence, and anticipated gay liberation by decades--all before his suicide at age forty-one. This New York Times-bestselling biography of the founder of computer science, with a new preface by the author that addresses Turing's royal pardon in 2013, is the definitive account of an extraordinary mind and life. Capturing both the inner…