100 books like X Y & Z

By Dermot Turing,

Here are 100 books that X Y & Z fans have personally recommended if you like X Y & Z. Shepherd is a community of 12,000+ authors and super readers sharing their favorite books with the world.

When you buy books, we may earn a commission that helps keep our lights on (or join the rebellion as a member).

Book cover of The Hut Six Story: Breaking the Enigma Codes

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 Enigma story and Bletchley Park are now legitimate subjects for academic study, but modern books are necessarily written by people without first-hand experience of wartime Intelligence work. As a publisher, I have always been keen to record the experiences of those people personally involved in such things, and Welchman was not just a leading codebreaker at Bletchley Park throughout the whole war, he was also instrumental in transforming a random collection of a hundred academics into a non-stop production line of codebreaking and Intelligence, employing over ten thousand people. This, our best-selling book, continues to intrigue readers worldwide.

By Gordon Welchman,

Why should I read it?

1 author picked The Hut Six Story as one of their favorite books, and they share why you should read it.

What is this book about?

Book by Welchman, Gordon


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 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…


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 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 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 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 Glamour Boys: The Secret Story of the Rebels who Fought for Britain to Defeat Hitler

David C. Dawson Author Of A Death in Berlin

From my list on historical gay heroes.

Why am I passionate about this?

I’ve read a lot of books that feature gay characters. These characters often partition into two main groups: angsty men who are victims of oppression or illness, or camp stereotypes who provide the light relief. I prefer to read about heroes who happen to be gay. That’s why I started writing novels. My recent books are historical novels inspired by real gay heroes. The feedback I get from readers indicates that there are a lot of people who want the same as I do.

David's book list on historical gay heroes

David C. Dawson Why did David love this book?

The untold true story of how a group of gay MPs lobbied the British government to stop its policy of appeasing Hitler in the run up to WWII. It’s a book about patriotic heroes who are criminals in their own land because of their sexuality. It moved me deeply and inspired my own fictional thriller set in Berlin in 1933.

By Chris Bryant,

Why should I read it?

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

What is this book about?

A STORY OF UNSUNG BRAVERY AT A DEFINING MOMENT IN BRITAIN'S HISTORY

'Superb' Stephen Fry
'Thrillingly told' Dan Jones
'Fascinating' Neil MacGregor
'Astonishing' Peter Frankopan

We like to think we know the story of how Britain went to war with Germany in 1939, but there is one chapter that has never been told. In the early 1930s, a group of young, queer British MPs visited Berlin on a series of trips that would change the course of the Second World War.

Having witnessed the Nazis' brutality first-hand, these men were some of the first to warn Britain about Hitler, repeatedly…


Book cover of The Double-Cross System: The Classic Account of World War Two Spy-Masters

Jim Carr Author Of Camp X Doublecross

From my list on World war novels for people who love history and fiction.

Why am I passionate about this?

The Second World War has always fascinated me, starting when I first entered school. The war had just started and it became even more real with each successive class when we were encouraged to buy war-saving stamps. On the home front, we experienced blackouts and mock air raids. Sugar, meat, butter, alcohol, and even gasoline were rationed. My cousins were overseas and in the thick of it. They always made sure I had an airplane model at Christmas. And as the war wound to a close, they sent me a cap from one from one of the German soldiers. It still intrigues me and still lives in my head.

Jim's book list on World war novels for people who love history and fiction

Jim Carr Why did Jim love this book?

The war was also operated at an unseen level and J. C. Masterson was in the midst of it–espionage. The Brits added another to it–double cross, in which they provided known German agents with false information, and were successful in convincing the Germans that D-Day landings would take place in the Pas de Calais.

The book is an authoritative account of their activities and the great nicknames they used to pull it off. Names like Snow, Celery, Biscuit, Charlie, Midas, Dragonfly, Tricycle, and what their responsibilities were. They also used letter-writing agents who were part of their deception to get the Germans to retain a Panzer division in the Bordeau area, away from the landing area. You’ll marvel at their cleverness.

I know the book intrigued me and I’m sure you’ll come away from it amazed as I was.

By J.C. Masterman,

Why should I read it?

3 authors picked The Double-Cross System as one of their favorite books, and they share why you should read it.

What is this book about?

J.C. Masterman was chairman of the Double-Cross Committee at the height of World War Two. This is his account of the double agents, deception and counter-espionage which were key to the victory of D-Day.

Written as an official report for MI5 in 1945, originally published with the permission of the British Government over twenty years later, The Double-Cross System details the Allied handling of enemy agents and the British infiltration of Nazi spy-rings.

Telling the stories of the agents codenamed Zigzag, Tricycle, Garbo and Snow, Masterman also tells the story of a triumphant operation in the Second World War's intelligence…


Book cover of One Day in August: Ian Fleming, Enigma, and the Deadly Raid on Dieppe

Arthur W. Gullachsen Author Of Bloody Verrières: The I. SS-Panzerkorps Defence of the Verrières-Bourguebus Ridges: Volume II: The Defeat of Operation Spring and the Battles of Tilly-la-Campagne, 23 July–5 August 1944

From my list on the First and Second World Wars.

Why am I passionate about this?

I have a lifetime interest in military events of the First and Second World Wars, and my current status as an Associate Professor teaching military history within the Royal Military College of Canada’s RMC History Department allows me to live my dream of exploring past conflicts for a living. I am currently also a contracted author at Casemate Publishing of Havertown, PA, and I am very lucky to have this company support me and publish my work.

Arthur's book list on the First and Second World Wars

Arthur W. Gullachsen Why did Arthur love this book?

This is a new and interesting exploration of the reasons behind the disastrous Second World War Anglo-Canadian Dieppe Raid of 19 August 1942.

O’Keefe investigates newly available British archival material to reveal the designs British naval intelligence had on the port of Dieppe and how the resulting raid revolved around the capture of a highly important German Enigma encryption device and codebooks. 

These materials were desperately needed to produce ULTRA intelligence, vital for Allied efforts in the Battle of the Atlantic. 

By David O'Keefe,

Why should I read it?

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

What is this book about?

'A lively and readable account' Spectator

'A fine book ... well-written and well-researched' Washington Times

In less than six hours in August 1942, nearly 1,000 British, Canadian and American commandos died in the French port of Dieppe in an operation that for decades seemed to have no real purpose. Was it a dry-run for D-Day, or perhaps a gesture by the Allies to placate Stalin's impatience for a second front in the west?

Historian David O'Keefe uses hitherto classified intelligence archives to prove that this catastrophic and apparently futile raid was in fact a mission, set up by Ian Fleming…


Book cover of The Hut Six Story: Breaking the Enigma Codes
Book cover of The Bletchley Park Codebreakers
Book cover of Alan Turing: The Enigma

Share your top 3 reads of 2024!

And get a beautiful page showing off your 3 favorite reads.

1,388

readers submitted
so far, will you?

5 book lists we think you will like!

Interested in the Enigma machine, military intelligence, and Bletchley Park?

Bletchley Park 10 books