A Journey into the Interior of the Earth

Lilith: A Romance

Occasion ... for Disaster

The Lost Continent

Off on a Comet! a Journey through Planetary Space

The gods of Mars

The Hour of the Dragon

The warlord of Mars

The People of the Black Circle

Out of Time's Abyss

Time Crime

Supermind

The Chessmen of Mars

Red Nails

The Crack of Doom

Lone Star Planet

The Land That Time Forgot

The Lost World

Plague Ship

Space Station 1

The Broker's Cage

The Apostate's Wager

Echoes of the Glimmerwood