counsel of wyrms setting was an odd one where you played a dragon as a player, also gave us half dragons and was one of the main reasons for dragon born we have now. Hollow world would be cool as well but that is very big and doubt could be really covered in on book as this one. Jakandor, released in 1998, is a self-contained "campaign arena" conceived by Jeff Grubb. Jakandor is an island divided between the native Charonti, a civilization that makes heavy use of magic (especially necromancy), and the Knorr, barbarians who despise the vile practice of magic and have been driven from a far-away homeland to Jakandor. Also ghost chasers setting for modern and dark matter, Urban Arcana Campaign Setting, Apocalypse which had no real setting to speak of as with past, future and cyberscape heck they could put them all into a gamma world like setting. But star fronters would may be be better for the future stuff and cyber things than gamma world. Ghostwalk was a cool one and could be done in one book but it is close to some they have done so not ure on that one. Kingdoms of Kalamar is one but again a fantisy setting so maybe not just like Lankhmar and Mahasarpa which is an asian setting but still in the fantisy vain.