Sam Ward was yearning for adventure when a Cherokee man arrived from a distant village with a tale of a monstrous hairy creature threatening his land. The formerly peaceful beast went rogue upon the death of its mate, and the chief of the Twilight People sent Otter to ask for help. Sam's quest quickly turns dangerous with new challenges and new enemies, but using their wits, skills, and courage, Sam and Otter finally face Giluhda, last of the living mammoths.

Originally published in Startling Stories in 1942, 'Devil's Planet' was Manly Wade Wellman's fourth published science fiction novel, and it combines an adventure story set on Mars with a locked room murder mystery. Dillon Stover lands on Mars with a mission to continue his grandfather's work to bring a sustainable water supply to the parched planet, but before he knows it he finds himself accused of murder and on the run.