Mostly with latest version

o Network Bookshelf
DNS & BIND
TCP/IP Network Administration
sendmail
sendmail Desktop Reference
Building Internet Firewalls
Practical UNIX & Internet Security

o Perl Bookshelf
Perl in a Nutshell
Learning Perl
Learning Perl on Win32 Systems
Programming Perl
Advanced Perl Programming
Perl Cookbook

o Perl Bookshelf v2.0
Perl in a Nutshell
Programming Perl, 3rd Edition
Advanced Perl Programming
Perl Cookbook
Perl for System Administration

o Unix Bookshelf
UNIX Power Tools
UNIX in a Nutshell: System V Edition
Learning the vi Editor
sed & awk
Learning the Korn Shell
Learning the UNIX Operating System

o Java Reference Library
Java in a Nutshell
Java Language Reference
Java AWT Reference
Java Fundamental Classes Reference
Exploring Java

o The Java Enterprise CD Bookshelf
Java Enterprise in a Nutshell
Java in a Nutshell, Third Edition
Java Foundation Classes in a Nutshell
Enterprise JavaBeans, Second Edition
Java Servlet Programming
Java Security
Java Distributed Computing

o Web Reference Library (Web Developer's Library)
HTML: The Definitive Guide
CGI Programming on the World Wide Web
java script: The Definitive Guide
Programming Perl
Webmaster in a Nutshell

Using Samba - local
Using Samba - O'Reilly
Using Samba, 2nd Edition - O'Reilly
Linux Network Administrator's Guide 2nd ed. - O'Reilly
Web Client Programming with Perl
OReilly Virtual Private Networks 2nd
Open Sources: Voices from the Open Source Revolution

o Other Books
TCP_IP_Illustrated Volume One
Teach Yourself Oracle 8 In 21 Days
MySQL Reference Manual
Red Hat Linux Unleashed
Slackware Unleashed
Apache Server Survival Guide
Linux System Administrator's Survival Guide
Maximum Security: A Hacker's Guide
Rex Swain's HTMLified Perl 5 Reference Guide
McGraw Hill: Firewalls Complete
Active X and VB Script
Developing Java Applets
Macmillan: Borland C++ Builder Unleashed
Windows NT Security Guidelines: A Study for NSA Research