Building Secure and Reliable Systems
Heather Adkins & Betsy Beyer & Paul Blankinship & Piotr Lewandowski & Ana Oprea & Adam Stubblefield
Linux Firewalls
Michael Rash
Mastering OpenLDAP
Matt Butcher
Bash Idioms: Write Powerful, Flexible, Readable Shell Scripts
Carl Albing & J P Vossen
Certified Ethical Hacker (CEH) Exam Cram
William Chuck Easttom