Fans pick 100 books like Delusions of Intelligence

By R.A. Ratcliff,

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

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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 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 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 I Worked Alone: Diary of a Double Agent in World War II Europe

Mary Kathryn Barbier Author Of Spies, Lies, and Citizenship: The Hunt for Nazi Criminals

From my list on WW2 intelligence history.

Why am I passionate about this?

I am a professor at Mississippi State University and a historian of World War II in general and, more specifically, of WWII intelligence history. My interest stems from a research topic that my Ph.D. advisor recommended and that became the subject of my dissertation – Operation Fortitude, which was the deception plan that provided cover for the Normandy Invasion. While my own research interests are focused on the intelligence history of the Normandy invasion, I am increasingly drawn to intelligence history or novels that showcase the people, technologies, and other theaters of war.

Mary's book list on WW2 intelligence history

Mary Kathryn Barbier Why did Mary love this book?

As the title of this book indicates, Lily Sergueiew was a double agent during World War II. She volunteered to become a spy for the Germans although she never intended to fulfill that role. She was determined to fight the Germans in her own way – as a double agent in the employ of the British. Sergueiew kept a diary of her activities from when she first approached the Germans until she quit working for the British in late June 1944. After the war, Sergueiew used her diaries to write a memoir in French. Before her death in 1950, she translated her memoir into English, and most of it was published posthumously in France in 1966 and in England in 1968. I recommend this book because it provides insight into why a young woman would choose to fight against the Germans who occupied her beloved France, the training that she…

By Lily Sergueiew,

Why should I read it?

1 author picked I Worked Alone as one of their favorite books, and they share why you should read it.

What is this book about?

During World War II Nathalie ""Lily"" Sergueiew, a woman of mystery, confidently seduced the German Intelligence Service into employing her as a spy against their British enemy. Little did they know that this striking woman - who turned heads when she walked into a room with her little dog Babs - would in reality work with their enemy against them. Her diary chronicles her years as a double agent for the British from 1940-1945 under the code name Treasure. From the moment she conceived the idea of becoming a double agent, Lily faced challenges on two fronts: first, she had…


Book cover of Game of Spies

Peter Dixon Author Of Return to Vienna: The Special Operations Executive and the Rebirth of Austria

From my list on living undercover in constant danger during WW2.

Why am I passionate about this?

Hodder and IVP had already published two of my earlier books—during my three decades as a Royal Air Force pilot and another one leading a conflict resolution NGO—when my journey as a WW2 author began. It all started with my wife's book about her German mother and British Intelligence Corps father (The Bride's Trunk). That got me interested in the links between 'the Corps' and the Special Operations Executive. Three SOE books later, I’m following the organisation into Austria. I've barely scratched the surface of undercover operations and I’m always finding new niches to discover.

Peter's book list on living undercover in constant danger during WW2

Peter Dixon Why did Peter love this book?

Apart from viewing the late Paddy Ashdown as perhaps the best Prime Minister Britain never had, I also know him as an under-recognised author of gripping Second World War books. The community of WW2 researchers is mutually supportive; knowledgeable colleagues have been immensely helpful to me over the years, and I recall helping Paddy with some information for one of his books. Several of them are worth reading, but here he tells the true stories of three men who pitted their wits against each other in the treacherous milieu of wartime France. The stakes were measured in lives, betrayals, and deaths.

By Paddy Ashdown,

Why should I read it?

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

What is this book about?

Spies, bed-hopping, treachery and executions - this story of espionage in wartime Bordeaux is told for the first time.

Game of Spies uncovers a lethal spy triangle at work during the Second World War. The story centres on three men - on British, one French and one German - and the duels they fought out in an atmosphere of collaboration, betrayal and assassination, in which comrades sold fellow comrades, Allied agents and downed pilots to the Germans, as casually as they would a bottle of wine.

In this thrilling history of how ordinary, untrained people in occupied Europe faced the…


Book cover of Hitler's Last Army: German POWs in Britain

Ken Scott Author Of Do the Birds Still Sing in Hell?

From my list on WWII prisoner of war.

Why am I passionate about this?

I have studied WW2 and prisoners of war during that period for more than 20 years. They're very much the forgotten soldiers of war in my opinion. Few spoke of their treatment and brutality at the hands of the enemy, starvation, and the psychological effects that they lived with for many years afterward. Marriages fell apart, alcoholism was commonplace and many committed suicide, during a time where the term PTSD hadn't been invented. I've selected books that tell the story from several different perspectives. There were good and bad on all sides and for every ten stories of brutality and murder, there were another ten stories of good men and women who did their best to help the POWs survive.

Ken's book list on WWII prisoner of war

Ken Scott Why did Ken love this book?

Not a subject often written about and sometimes we forget that the Allies held POWs too. A fascinating insight into German POWS held on UK soil helped me with another one of my collaborations, the book, The Psychiatrist by John West.

Very well researched and written, at times sad, other times very moving, and some nice tales which reflect the old adage that all wars are futile. One arrives at the clear conclusion that young German men were no different to our own boys, except those who took on the Nazi propaganda and believed it until the bitter end.

By Robin Quinn,

Why should I read it?

1 author picked Hitler's Last Army as one of their favorite books, and they share why you should read it.

What is this book about?

After the Second World War, 400,000 German servicemen were imprisoned on British soil, some remaining until 1948. These defeated men in their tattered uniforms were, in every sense, Hitler's Last Army. Britain used the prisoners as an essential labour force, especially in agriculture, and in the devastating winter of 1947 the Germans helped avert a national disaster by clearing snow and stemming floods, working shoulder to shoulder with Allied troops.

Slowly, friendships were forged between former enemies. Some POWs fell in love with British women, though such relationships were often frowned upon: `Falling pregnant outside marriage was bad enough -…


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

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