HP-UX CSE(c) Official Study Guide and Desk Reference

Garfinkel, Siman and Spafford, Gene, Practical UNIX and Internet Security , 2nd edition. O'Reilly and Associates Inc., 1996, ISBN 1-56592-148-8.

Stoll, Clifford, The Cuckoo's Egg , Pan Books, ISBN 0-330-31742-3.