I don't have any friends who haven't read it who would appreciate it, but Clifford Stoll's The Cuckoo's Egg is both a highly entertaining thriller, a fascinating look at how computer security was, and is, viewed, and a highly personal story about a man trying to figure it all out. It's very funny, entirely true, and taught me a lot.

Oddly, a lot of people hated the various more personal aspects of the book, as you see Cliff's friends, and his life as a whole. While that's valid, calling it a flaw in the book is, I think, inaccurate. The book as much a story a story about Cliff as the shadowy hacker on the other side of the wires, and that's a big part of its charm, IMHO.

Ghost in the Wires, and Exploding the Phone are also good, and true stories.