Here are some other books you can read to help you understand the hacker mindset.

[Markoff-ampersand-Hafner] Cyberpunk: Outlaws and Hackers on the Computer Frontier. Katie Hafner. John Markoff. Simon & Schuster. Copyright 1991. ISBN 0-671-68322-5.

This book gathers narratives about the careers of three notorious crackers into a clear-eyed but sympathetic portrait of hackerdom's dark side. The principals are Kevin Mitnick, Pengo and Hagbard of the Chaos Computer Club, and Robert T. Morris (see RTM, sense 2). Markoff and Hafner focus as much on their psychologies and motivations as on the details of their exploits, but don't slight the latter. The result is a balanced and fascinating account, particularly useful when read immediately before or after Cliff Stoll's The Cuckoo's Egg. It is especially instructive to compare RTM, a true hacker who blundered, with the sociopathic phone-freak Mitnick and the alienated, drug-addled crackers who made the Chaos Club notorious. The gulf between wizard and wannabee has seldom been made more obvious.