Open Source
Edited by Chris DiBona, Sam Ockman & Mark Stone
Discusses open source issues
Open Sourcet
Donald K. Rosenberg, Ph. D MBA
Open source review
The Cathedral & The Bazaar
Eric S. Raymond
The classic open source addvocacy book by Eric Raymond who took on the role of sensible champion
Just For Fun
Linus Torvalds and David Diamond
How the Linux operating system was developed