MIT Press Book On Open Source Now Free
"MIT Press has released its book Perspectives on Free and Open Source Software as a free PDF download. The book is a collection of research essays covering topics such as open source motivation, economics, business models, software development process and tools, law, and community. Sort of like 'Open Sources' from academics. David Parnas, Larry Lessig, Eric von Hippel, and Clay Shirky are among the contributors."