At the Earth’s Core
Edgar Rice Burroughs
Pellucidar (1)
The Chessmen of Mars
Martian (5)
The Gods of Mars
Martian (2)
The Land That Time Forgot
Pellucidar
Pellucidar (2)
A Princess of Mars
Martian (1)
Thuvia, Maid of Mars
Martian (4)
The Warlord of Mars
Martian Series (3)