Sair Linux and GNU Certification Level I, - Paperback, by Maginnis Tobin - Good

Learning Debian GNU/Linux - Paperback By McCarty, Bill - GOOD

CompTIA Linux+ Guide to Linux Certification - Paperback - VERY GOOD

Sair Linux and GNU Certification Level I guide: Tobin Maginnis

Debian GNU / Linux 3.1 Bible

FTCE General Knowledge - Paperback, by Florida Teacher Certification - Very Good

Gnu Autoconf, Automake and Libtool - Paperback, by Gary V. Vaughn; - Very Good

Linux+ and LPIC-1 Guide to Linux Certification 5E- paperback, Jason Eckert