The Wiki Way: Quick Collaboration on the Web by Bo Leuf and Ward Cunningham is a book about the WikiWiki collaborative editing system, such as that used on Wikipedia. Ward Cunningham is the creator of the original Wiki software (today there are many different wiki engines). The book is about how to install/customize/manage wiki systems, followed by a perspective on the nature of wiki-style online communication.
The Wiki Way. Quick collaboration on the Web, Addison-Wesley (April 2001) ISBN 0-201-71499-X