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Though the book is very fun to read, some of the themes could have been better developed. For example, the idea that by destroying all of Adam Snell's work would eliminate him from history could have been taken a lot further. PFITZ by Andrew Crumey plays with many similar ideas concerning the creation of a character and the possibility of being forgotten with the elimination of one's work, and PFITZ is better in that respect. Also, the reasoning behind the attacks by Underwood is fairly lame.
Even though the book is not perfect it still has many good qualities and if you're looking for a book to enjoy during the beautiful spring weather, you won't be disappointed with this one.
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Having said that, this is a *good* reference manual. It contains none of the usual boilerplate text all too common in badly written manuals. It explains every feature of Xlib and the X11(R5) protocols in detail, and how to make best use of them. It is concise, well-organized, and to the point. And the index is actually quite useful.
The book is not entirely up-to-date. It would be better if it also covered some of the newer standards and extensions. There are some minor typos that might be corrected in the newer versions, but none that will give you any trouble. As the book focuses only on core protocols, you must look elsewhere for information on how to interoperate with Motif, Qt/KDE or GTK applications.
In short, if you are going to write some program that uses Xlib or the X11 protocol directly, this book will help you. And the differences between X11R5 and X11R6 are relatively minor and of little interest to the kind of applications most people would write without a toolkit. But still, if you are a toolkit developer, I would consider buying a newer book.
X Window System: Core Libraries and Standards (1996, 700pp)
X Window System: Core and Extension Protocols (1997, 700pp)
X Window System: Extension Libraries (1997, 400pp)
Each of the new books covers through X11 Release 6.1.
I own this book, but I do not own the three newer books (I didn't know that they were replacements for this book). I contribute to the XFree86 project, an implementation of the X Window System, and I find this book to be useful in understanding the operations of X; I have not written a program that uses X11 directly, but I can see that this book (or its replacements) would be very useful when doing so.
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I suppose this was partially due to a darker tone to the book, maybe this was imparted by the fact that much of the book take's place in the middle of the night. I am sure another aspect was that the some of the subject matter was a bit redundant to me, having recently finished the lenghty tome Cryptonomicon by Neal Stephenson. I was also put off by the now familiar, having read FatherLand and Archangel previously, literary and thematic twist that Harris employs of couching the revealation of historical pogroms and monstrostisties as the cause of the books mystery. All of these three books employ this same device, so that by the end of Enigma I was not that surprised by the historical cause of the "enigma".
Having said all of that, I did enjoy the book, especially the insight into the accomplishments of Bletchley Park as well as the mystery Claire's dissapearance. I guess it was just not as enjoyable as Fatherland, and it was probably a mistake to tear through three of his books in so short a time period.
Both these storylines revolve around the main character, Tom Jericho, a cryptanalyst working on breaking the german naval enigma code.
'Enigma' starts off very slowly, and after 90 pages, I was about to put the book down and move on. However, Harris really starts getting to the heart of the action about this time, and the book really takes off. Perhaps he could have condensed the first 90 pages and made this book five stars, but taken as a whole 'Enigma' is quite entertaining.
If you enjoy books about wartime codebreaking, you will definitely want to read this book. If you read and enjoy 'Enigma', you should check out Neal Stephenson's 'Cryptonomicon.'
The main character is Tom Jericho, a mathematician and cryptoanalysist who works in a government building in Britain, trying to crack the Nazi Enigma code known as Shark. Tom and his team manage to crack Shark a month ago, but the Nazis have set up a new version that makes Shark, which already has several million ways of encoding, just 26 times harder. Jericho is overworked and tired, and distraught over his girlfriend, Claire, dumping him, but he is sent back to help the team crack the new code. The Nazi U Boats are planning an attack in 4 days, and the code is virtually impossible to crack in that amount of time. To make things worse, Jericho finds that Claire is missing under very strange circumstances. Jericho must deal with the constant memories of Claire, and team up with Hester, Claire's roomate, and his many co-workers to solve the mystery of the Shark.
The book is very intelligently written. Harris knows exactly what he is talking about, from historical facts to every little detail of the Enigma machines and codes. He delivers these facts to you in an engaging style that keeps you riveted. This book is NEVER boring. Even the long passages about the codes and mathematics are so interesting the pages just fly by. I'm a person who detests math with all my heart, but this book manages to capture my interest and hold it.
I'm amazed at how the characters are portrayed. They're all superbly characterized, even the very minor ones, each with their own unique speaking style and actions and motives. The characters are so realistic that you're able to see all them and REMEMBER all twenty or so main characters as if you've known them all before.
The pacing of the book is fast, but manages to deliver romance and deep thinking without dragging the book down. The superb, complex plot, the characters, and the intriguing details make you want to go back and read it again.
Note: you'll probably need a dictionary or at least some knowledge of WW2 to fully understand all the terms and references in this book.
One thing is for certain, you'll put down Enigma enlightened to a lot more about WW2, in addition to having read a great book.