Edgar Rice Burroughs Universe Series by Matt Betts, Christopher Paul Carey, Win Scott Eckert, Geary Gravel

Stranded on an alien world for nearly two decades, Earthman Carson Napier finds his own past haunting him in strange and terrifying ways when he’s confronted by a sinister madman bent on ruling Amtor. To stop his opponent and his insidious weapon, Carson must gather an alliance of friends and former enemies alike in an epic struggle for control of the planet.

Tarzan of the Apes, Jason Gridley, and the crew of the airship O-220 return to Pellucidar, the world at the Earth’s core, on a wartime mission to stop the Nazis from obtaining a powerful superweapon... moreTarzan of the Apes, Jason Gridley, and the crew of the airship O-220 return to Pellucidar, the world at the Earth’s core, on a wartime mission to stop the Nazis from obtaining a powerful superweapon. But when the Lord of the Jungle’s murderous adversaries partner with the Mahars—Pellucidar’s dethroned reptilian overlords—and his adventurous granddaughter Suzanne goes missing on a reconnaissance mission, can Tarzan prevent the conquest and enslavement of all humanity in both the inner and outer worlds? less

After his strange arrival on Barsoom, John Carter battled countless perils to win the heart of his beloved Dejah Thoris and went on to shatter the age-old chains that bound his adopted world to a false religion. But now an ancient and monstrous evil stirs beneath the Red Planet’s surface and threatens to destroy all he holds dear.