Take a look at: <http://otp.inlimine.org/> This is a project to develop "open copyrighted" textbooks. I'm not clear on whether they plan to use the OPL license or some other form of copyleft. This bears watching and possibly helping. Doug Loss Democracy substitutes election by the dloss@csrlink.net incompetent many for appointment by (570) 326-3987 the corrupt few. George Bernard Shaw