Magnus wrote
Because it's something different. Like wikibook is something different than wikipedia, annotating public domain texts and summarizing copyrighted ones is something different than writing a completely new book on, say, biochemistry, or Spanish.
But Wikibooks has already decided to do this! Wikibooks /is not/ just about textbooks. So please don't fork the project. This is completely unnecessary.
Wikibooks is supposed to be a free bookstore/library. So just about anything you would expect to find in such a place you should find in Wikibooks. Annotating public domain books /is/ in our mandate because it is part of the instructional process of students.
-- Daniel Mayer (aka mav)