I've been introduced to wikibook by a friend who wrote a wikibook to document a piece of software he wrote. I've been writing a whole tutorial called Cyberbotics' Robot Curriculum on how to program the e-puck robot with the Webots™ software. The whole book is available as a PDF and this version was updated as often as necessary during the writing of the book. Now Cyberbotics has the responsability of the book, I'm not in the project anymore. Here is the link :