I do not really have a non-fiction as a recommendation, but how about a true story? This book,
The Cuckoo's Egg, was recommended by my professor back in the university for a reading material in UNIX class. It accounts for Clifford Stoll's story to hunt a computer hacker when he was working at Lawrence Berkeley National Laboratory.
The story is quite interesting, and I must say Mr. Stoll wrote it well, especially about his experience with various government agencies like FBI, CIA, NSA, and Air Force OSI. His humor about these agents are also funny (at least for me).
The book was adapted into an episode in the 1990 Nova television series titled "The KGB, The Computer, and Me".
You know what, I can't really make a good persuasion for you to read this book, but I hope you will at least check it out. And even if this is not a GOG competition, even if you only want a book recommendation, I'd still recommend this book. Chances are you won't regret it.