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Alan Turing: The Enigma

3.74  ·  Rating details ·  10,370 ratings  ·  969 reviews
Alan Turing (1912-54) was a British mathematician who made history. His breaking of the German U-boat Enigma cipher in World War II ensured Allied-American control of the Atlantic. But Turing's vision went far beyond the desperate wartime struggle. Already in the 1930s he had defined the concept of the universal machine, which underpins the computer revolution. In 1945 he ...more
Paperback, 608 pages
Published March 1st 2000 by Walker Books (first published November 1st 1983)
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Rick OK. To each his/her own. The math was the most fascinating part of the book for me. I found the complex abstract ideas amazingly clearly explained. Th…moreOK. To each his/her own. The math was the most fascinating part of the book for me. I found the complex abstract ideas amazingly clearly explained. The writer has a real gift. "Kids get turned off in school"? I would have given much to have had these things taught to me when I was a kid. But I grant that kids are poorly taught and maybe that's an issue affecting Christina. For example, numbers are never introduced to kids as recursive objects; they're simply given as symbols. This is wrong. They are abstract ideas. Most kids are never taught that numbers are independent of their base 10 representation. I could go on... (less)
CarolAnn They say the movie was "inspired" by the book. Personally, I didn't see any evidence that the moviemakers read the book.…moreThey say the movie was "inspired" by the book. Personally, I didn't see any evidence that the moviemakers read the book.(less)

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B Schrodinger
Let me introduce you to Alan. He is a quiet and shy man, but one who mainly gets along with his colleagues. He is determined to tackle large questions and finds that his understanding of mathematics and logic can be applied to aspects of the universe around him, especially in areas that people would deem too messy and without any logic. He is a great proponent of going back to first principles when approaching problems also.

This book has been on my radar for years now. I found it after one of th
Alan Turing 23 June, 1912 - 7 June, 1954
Proximate Cause & Goodness of Fit
I'm not too proud to admit that the impetus for my picking up this biography was a trailer for the upcoming film on Alan Turing and his involvement with cracking the Enigma code during WWII ( The Imitation Game ). However, if you are interested exclusively (or even primarily) in the cryptanalytic exploits of Turing et al. at Bletchley Park then this is probably not — repeat not the Turing book for you.
Nick Pageant
Sep 15, 2014 rated it really liked it
Shelves: nonfiction
This was a fascinating book. I'm not really recommending it because I thought it was overly complicated and I'm not sure that a lot of people will want to spend half of their reading time on Wikipedia the way I did. I only understood about a quarter of the many, many mathematical concepts that were discussed, at exhausting length, in the book. Still, I'm glad to know more about the man who contributed so much to computer science. He had a fascinating, tragic life. Great book, but be prepared for ...more
Diane in Australia
I loved this book. I was almost afraid to read it after others said how difficult it was to understand the math sections, but I found those to be fascinating. If math had been taught this way in my schools, I would have enjoyed it a lot more. I even read some of the maths bits to my husband!

As to Turing's life, I very much enjoyed reading about that, too. I wish I had known him. The way his mind works just took my breath away. I found myself going back over paragraphs, just to make certain I wou
Will Ansbacher
To read this is to feel humbled, not just by Alan Turing’s brilliant mind, but also by the years of dedicated work that Andrew Hodges put into this biography. At 700-plus pages, including a massive number of footnotes and references which are themselves a fund of fascinating information, it is dense going however, and probably not for everyone, although I found it totally absorbing**.

Here finally (well, not really “finally” as it was written in 1983) was someone who could explain Turing’s unive
E. G.
List of Plates

--Alan Turing: The Enigma

Author's Note
Holly Dunn
That's certainly cleared up a lot of the questions I had following the film. It concerns me that Cumberbatch's Turing seemed to stray dramatically from biographical evidence. The film paints him in a dangerously stereotypical way, as the lone genius, unable to work well with others and with little care for his fellow humans. It would seem the Turing was a well-liked person, albeit one who didn't care very much what people thought of him, especially concerning his sexuality.

If you saw and enjoye
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This is one of those books that I'm really torn on how to rate. On the one hand, I think it was really well and meticulously researched, but on the other hand, it kinda felt like I was experiencing his life in real time through this audio. It was SO very long. SO detailed.

A lot of this book went well over my head. The math, the science, the engineering, the cryptology, the theoretical concepts... I love these things, but that doesn't mean I UNDERSTAND them. I completely admit that I let most of
Feb 16, 2015 rated it it was amazing  ·  review of another edition
I watched The Imitation Game last week and I was left in awe, and slightly ashamed of myself for not knowing the contribution of Alan Turing to the war efforts and the advent of the computer age. After the film i bought this book and a few others in order to get to know more about the brilliant man and the code-breaking that went on during WW2. This is an extremely well-written and detailed book, and while a little heavy of the maths side there is nothing not to be expected from a biography abou ...more
Mar 16, 2011 rated it really liked it  ·  review of another edition
Shelves: nerd-stuff
(4.5) Quite a thorough biography, I prefer the Bletchley Park period, but quite complete picture of his life

I only have a couple of complaints. The book is quite lengthy. I feel that some digressions into the politics at his boarding school, for example, weren't worth diving into to explain the effect it had on his presence there. Hodges also employs this extended mixed metaphor intertwining Alice in Wonderland (apropos), Wizard of Oz (less so), among others. Not sure it helped to continue refer
Katia N
Oct 23, 2013 rated it really liked it
Very detailed and well researched biography. Also big part is devoted to the details of specific maths projects Turing was involved in different periods of his life. The historic period background is well set out, especially in respect of gay rights or total lack of it. Only for me Alan Turing's character and motivation still remained almost total Enigma after emerging from this big book. May be it is simply impossible to "crack" his rich personality. ...more
Nov 06, 2018 rated it really liked it  ·  review of another edition
Shelves: 2018
Alan Turing was a mathematician. I have a degree in mathematics. Alan Turing ran marathons. I have run three marathons. Alan Turing lived in and around Wilmslow. I grew up in Poynton, just a handful of miles from Wilmslow. Can you see where I am going with this? HOWEVER, I used my mathematics to write computer programs (and deserted that after a few years) whereas Alan Turing invented computers and computer programming. I finished my marathons in the middle of the pack whereas Alan Turing was up ...more
Traci Haley
This biography was a struggle to get through. I picked it up in audiobook form in anticipation of The Imitation Game hitting theaters this fall. I didn't immediately realise how long and thorough it would be, though I knew I was venturing into a topic I knew very little about.

Here's the thing -- the parts of this biography that deal with Alan Turing's personal life are EXTREMELY interesting and well researched. I loved how detailed they were and found it a fascinating portrait of a man I knew ve
Nigel Watts
Dec 14, 2010 rated it liked it
I managed to finish the book but it was more of a struggle than it should have been. Good stories can tell themselves so why does Hodges have to butt in all the time with his clumsy attempts to link everything in Alan's life to childhood stories and experiences? And Turing's homosexuality, his cruel treatment by the authorities and his eventual suicide speak for themselves; they don't need page after page of Gay Lib exegesis. Less would have been more.

Having got my irritation out of the way - an
Jul 24, 2019 rated it liked it
Shelves: biography
The mathematics go over my head, so it's Enigma: The Battle for the Code for me instead...Turing's homosexuality sounds very lonely, as he was unaware of London's underground scene & clumsy in his advances to friends. ...more
A movie was made based on this book - The Imitation Game (2014) with Benedict Cumberbatch, Keira Knightley, Matthew Goode.
Ishiro Suzuki
Aug 26, 2012 rated it really liked it
Shelves: math, biography
What a beautiful, kind, compassionate and wonderfully written biography. I cried when I read it, and when I think about it. I like biographies in general, but this one touched a special spot. You cannot but feel awed at the greatness of the personality that is being painted, intimidated by his genius, and infuriated at the obviously horrible treatment he received in return for saving the democratic world! Perhaps no other biography has elicited such a widely varying set of emotions such as this ...more
Feb 21, 2016 rated it really liked it
Ponderous in places, fast moving in others, this is the best attempt to capture Turing the man and mathematician. Always awkward; always shy in social situations, he grew to be "a man with a quite powerful build, yet with with the movements of an ' undergraduate' or a 'boy', without an attractive face.

A scholarship boy to a "public (i.e., private) school", Turing suffered the humiliations familiar (since Arnold's day) to any boy who was a loner and terrible at team sports. He hero worshiped (and
Feb 15, 2018 rated it really liked it
in the early days of computing, a number of terms for the practitioners of the field of computing were suggested in the Communications of the ACM — turingineer, turologist, flow-charts-man, applied meta-mathematician, and applied epistemologist.
- wiki
In a man of his type, one never knows what his mental processes are going to do next.
- JAK Ferns, Turing's coroner

There have been two big films about Turing (three if you count the uselessly fictionalised Enigma (2001)). All of them are more
Jan 11, 2015 rated it really liked it
Shelves: science, biography
Alan Turing: The Enigma by Andrew Hodges is an enigma in its own right. Its subject, the British mathematical genius who contributed to the cryptanalysis of the Nazi enigma code and to the beginnings of the computer, was not an easy subject. He was a homosexual at a time when homosexual acts were considered a crime. He was a largely unhappy loner. And he was a powerful intellectual.

Hodges adopts three approaches to his biography. First, he gives the facts of Turing's life as much as it was possi
Aug 30, 2017 rated it really liked it
This biography of Turing, that eventually spawned the recent biopic The Imitation Game starring Benedict Cumberbatch, is a solid read and in some ways better than the movie.

The book focuses on more than just Turing's contributions around cracking the Enigma Code which is interesting in and of itself. As discussed in the book Turing made major contributions in bringing about the computer revolution, is called by some the father of modern computing, and played a vital role in advancing the theory
Like many, I purchased this because I very much enjoyed 'The Imitation Game'; it then sat upon my TBR shelf for well over a year. I felt that I should try my best to read it before 2016 was out, so I squeezed it into my November reading.

As far as biographies go, Alan Turing: The Enigma is incredibly long, running to 679 pages excluding the notes and index. The whole was not as well written as I was expecting, and it did not feel very consistent in places. The intricate mathematical details place
Carolyn Walsh
An exhaustive and exhausting biography of the brilliant Alan Turing. Winston Churchill said WW2 would not have been won except for Turing's invention of the Enigma, a code breaking machine. His work is credited as leading to the modern personal computer. I read this in preparation for the upcoming movie The Imitation Game, and also managed to find and watch an earlier movie, Breaking the Code starring Derek Jacobi as Alan Turing, online. Turing has not been as well known as he should have been, ...more
Sean Kennedy
Alan Turing is one of the most fascinating people of the twentieth century, yet you'd never know from reading this book. Don't pick it up expecting true insight into its subject - although the biographer himself admits a lot of source material has been lost or destroyed over the years, especially Turing's personal papers mentioning his personal life - as it dwells upon his scientific accomplishments. That's all well and good if you were reading a text for a uni course on crypto graphics or early ...more
Nov 23, 2014 rated it liked it  ·  review of another edition
This is a very, very in depth biography. So much that there were parts that I had to skip -admittedly mostly the actual mathematics portions which go quite a bit over my head. I can see what this was so well received, especially considering when it was written originally. If you're looking for something that really gets down the nitty gritty with regards to Alan Turing this is definitely your best bet. If you're looking for something to read to feel prepared to head into the film that's loosely ...more
Nick Black
Jul 04, 2012 rated it it was amazing  ·  review of another edition
Shelves: likely-reread
a perfect scientific biography, inferior only (so far as i know) to American Prometheus. heartbreaking and inspiring, a soaring, dazzling look into the life of the Great Man. ...more
Jess ❈Harbinger of Blood-Soaked Rainbows❈
I just saw the film tonight and was blown away. I really want to learn more about this man and his footprint on history. And before seeing the credits, I had no idea it was based in this book.
*grabby hands going wild*
Nicholas Spies
Feb 21, 2013 rated it really liked it  ·  review of another edition
I found Alan Turing the enigma by Andrew Hoges quite interesting and maddening. Interesting because of the genius and achievements of Turning, which are described in some detail (much to the author's credit) but maddening because of the sociopolitical asides about Turing's homosexuality (which was illegal in the UK during his lifetime), not just as they relate to Turing himself but to further an agenda of the author that detracts from Turing's story. I say this despite the evidence that homophob ...more
Jun 30, 2021 rated it it was amazing
I tend to think of Alan Turing as "the computer guy", but actually that was just one of the stages of Turing.

First there was the young Turing who was mostly interested in chemistry while at school.

Then there was the pure mathematician Turing who proved the Central Limit Theorem while an undergraduate at Cambridge and wrote a PhD thesis on post-Gödelian foundations of mathematics. The "Computable Numbers" paper came out of this stage which introduced the Turing machine: a computer as a mathematic
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Andrew Hodges is a British mathematician, author and an activist in the gay liberation movement of the 1970s.
Since the early 1970s, Hodges has worked on twistor theory which is the approach to the problems of fundamental physics pioneered by Roger Penrose.
He is a Tutorial Fellow in mathematics at Wadham College, Oxford University.

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“For him, breaking the Enigma was much easier than the problem of dealing with other people, especially with those holding power.” 27 likes
“Could a machine ever be said to have made its own decisions? Could a machine have beliefs? Could a machine make mistakes? Could a machine believe it made its own decisions? Could a machine erroneously attribute free will to itself? Could a machine come up with ideas that had not been programmed into it in advance? Could creativity emerge from a set of fixed rules? Are we – even the most creative among us – but passive slaves to the laws of physics that govern our neurons?” 18 likes
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