Perspectives on Free and Open Source Software – MIT Press
MIT Press has released a book covering topics of motivation behind the Open and Free Source movement from technical, economical, social, and legal views. This should be a fantastic read for those unfamiliar with what it is that drives Free/Open Source. Where it gets its strength from, and why it is becoming more and more a viable alternative to closed and proprietary software.
What is even better, in true free/open fashion, you can download the entire book for free.