I'm proud to announce that my NXT book that is to appear in June is listed now on Amazon.com! As you might deduce from the abstract there, it's about re-building some of Leonardo da Vinci's most famous inventions with LEGO and powering them with the NXT. All these robots get programmed with the five programming environments that are available presently to execute NXT programs directly on the brick (NXT-G, NXC, RobotC, pbLua and leJOS NXJ).
ps Will have to talk to the arts dept. on the cover, though. ;-)