If like me you use Play Book to store books and manuals, you will be sad to read the great Subversion book: svnbook. PDF format import fails to parse table of content and its navigation links. So I make the epub build of the book and everything works well now.
So for everyone who need it, I share the svnbook under the epub format:
Please note svnbook is maintained by svnbook.red-bean.com under open source licence.