The Pellucidar SF Gateway Omnibus

Carson of Venus SF Gateway Omnibus: Pirates of Venus, Lost on Venus, Carson of Venus

The Lost Continent

The People That Time Forgot: Land That Time Forgot Book 2

The Man-Eater

The Moon Trilogy - The Moon Maid, The Moon Men, & The Red Hawk: All Three Novels in One Volume

The Land That Time Forgot SF Gateway Omnibus

Beyond the Farthest Star

The Eternal Lover

Jungle Tales of Tarzan

The Wizard of Venus

Tarzan and the Foreign Legion

The Resurrection of Jimber-Jaw

The Moon Maid

The Monster Men

The Warlord of Mars

Out of Time's Abyss: Land That Time Forgot Book 3