Has anyone come across any good tools to manage a "bookshelf" of online documentation and books in general. Thinking about the big documents relevant to Fedora and credibly maintained (ie not download the howto's) I rapidly got past 20 good free/shippable documents. The trouble is they are in multiple formats even if they could all be output as PDF. - GNU manuals like the Emacs manual are generally texinfo but very comprehensive - Other online books are docbook (3,4,sgml and xml) - Some stuff is in OpenOffice - One or two are in weird "see we followed the license" xml but rescuable A properly organised bookshelf seems an ideal thing to have, I'm just wondering about tools