Books About Linux & UNIX

Free for All: How LINUX and the Free Software Movement Undercut the High-Tech Titans, Wayner, HarperBusiness 2000
Hardening Linux, James Turnbull, Apress 2005
Solaris Internals(TM): Solaris 10 and OpenSolaris Kernel Architecture (2nd Edition), Richard McDougall, Prentice Hall PTR 2006
The Cathedral and the Bazaar: Musings on Linux and Open Source by an Accidental Revolutionary, Raymond, O'Reilly 1999
The Design of the Unix Operating System, Bach, Prentice Hall 1987
The Unix Operating System, 3d ed., Christian / Richter, Wiley 1993
UNIX System Administration Handbook 3d ed., Nemeth, et al, Prentice Hall 2000
Understanding the Linux Kernel, Third Edition, Bovet / Cesati, O'Reilly 2005