The Moon Maid (The Moon Series Book 1)
The Red Hawk (The Moon Series Book 3)
The Cave Girl and The Cave Man
Adventures in Pellucidar
The Land of Hidden Men
Synthetic Men of Mars (Annotated) (barsoom series Book 9)
John Carter and the Giant of Mars
Llana of Gathol
The Eternal Lover
Tanar of Pellucidar