Books in the Bison Frontiers of Imagination series

The American explorer and emperor of Pellucidar, David Innes, has been captured by the deadly Korsar pirates. Picking up on the desperate cries for help emanating from Pellucidar, Jason Gridley brings the message to the only person who can help, Tarzan of the Apes. This is the fourth work in the "Pelludicar" series from the creator of "Tarzan".

Beneath the earth's surface lies a world of eternal daylight - Pellucidar. Scattered throughout are communities of distrustful humans and the cities of the reptilian, highly evolved Mahars. The authors' discovery of Pellucidar and the struggle to unite the human communities and overthrow the Mahars is a tale of conquest, deceit, and wonder.

In the twenty-first century, a battered world is ruled by a crafty old tyrant, Genghis II Mao IV Khan. The Khan is 93 years old, his life systems sustained by the skill of Mordecai Shadrach, a brilliant young surgeon whose chief function is to replace the Khan's worn-out organs.

A collection of tales that have played an integral role in the development of modern dark fantasy.

A runaway planet hurtles toward the earth. As it draws near, tidal waves, earthquakes and volcanic eruptions wrack our planet, devastating continents and wiping out millions. A team of scientists race to build a spacecraft to escape the doomed earth. Their greatest threat, they discover, comes not from the skies but from other humans.