Producing Open Source Software
Some times ago I have the lucky to read "Producing Open Source Software":
[...] a book about the human side of open source development. It describes how successful projects operate, the expectations of users and developers, and the culture of free software. The book is released under an open copyright: it is available in bookstores and from the publisher (O'Reilly Media), or you can browse or download it [...]Valuable parts, which we suggest to read:
Open source so can be a way for a cheap investiment.