Following are free books here
C++ in a Nutshell 2003
VB.NET Language in a Nutshell 2001
VB.NET Language in a Nutshell 2nd Edition 2002
VB.NET Core Classes in a Nutshell 2002
MCSE: Windows 2000 Exams in a Nutshell 2001
VB & VBA in a Nutshell: The Language 1998
ASP in a Nutshell 1999
Ruby in a Nutshell 2001
ASP.NET in a Nutshell 2002
ASP.NET in a Nutshell 2nd Edition 2003
Windows Server 2003 in a Nutshell
2003
Windows XP in a Nutshell
2nd Edition
2005
Linux in a Nutshell
4th Edition
2003
Cisco IOS in a Nutshell
2001
LPI Linux Certification
in a Nutshell
2001
J2ME in a Nutshell
2002
PC Hardware in a Nutshell
2nd Edition
2002
PC Hardware in a Nutshell
3rd Edition
2003
SQL in a Nutshell
2001
Sequence Analysis in a Nutshell
2003
Dreamweaver in a Nutshell
2001
ADO.NET in a Nutshell
2003
AppleScript in a Nutshell
2001
C# in a Nutshell
2nd Edition
2003
Cocoa in a Nutshell
2003
MacOS X in a Nutshell
2003
.NET Windows Forms
in a Nutshell
2003
Python in a Nutshell
2003
Web Design in a Nutshell
1999
Webmaster in a Nutshell
3rd Edition
2002
Unix in a Nutshell
2nd Edition
1992
Unix in a Nutshell
3nd Edition
1999
Lingo in a Nutshell
