13 books
Warriors of the Stone-Age
Ki-Gor, the Beasts of Ta'tamba
Ki-gor and the Giant Gorilla-men
The Lost Beasts of Ta'tamba
The Monsters of Voo Doo Isle and Other Stories
Ki Gor and the Nirvana of the Seven Voodoos
Bride of the Serpent God
Ki-Gor of the Jungle: King of the Jungle and the Stolen Empire
Ki-Gor
Jungle Stories #2
Jungle Stories
Ki-Gor King of the Jungle
KI-Gor, Lord of the Jungle