16 books in series

Gor

Gor is a 16-book series with 16 released primary works first released in 1967 with contributions by John Norman.

Tarnsman of Gor
Priest-Kings of Gor
Nomads of Gor
Assassin of Gor
Raiders of Gor
Captive of Gor
Marauders of Gor
Tribesmen of Gor
Slave Girl of Gor
Beasts of Gor
Explorers of Gor
Fighting Slave of Gor
Rogue of Gor
Guardsman of Gor
Savages of Gor
Mercenaries of Gor