Perspectives on Free and Open Source Software - Book edited by Joseph Feller, Brian Fitzgerald, Scott A. Hissam and Karim R. Lakhani. Site includes full text as PDF downloads of each chapter. - http://mitpress.mit.edu/catalog/item/default.asp?ttype=2&tid=11216
Free for All - Full text of Peter Wayner's book, subtitled "How Linux and the Free Software Movement Undercut the High-Tech Titans". [PDF] - http://www.wayner.org/books/ffa/
The Linux Cookbook - All-encompassing book on using open source software, which itself is open source and available online. - http://dsl.org/cookbook/