Back Cover Blurb
Stranded on an unknown planet, astronauts Bill Hudson, Jeff Allen and Judy Franklin are assaulted by fantastic visions that render them helpless. Rescue by a tribe of primitive Humanoids is their only hope of survival — a hope that is dashed when Judy inexplicably vanishes and Bill is captured and caged by an army of bloodthirsty gorillas...

Only then do they realize they have entered a world here apes rule and mankind lives under the leash...a world where a fight for life brings them to the deadly caverns of the Underdwellers and a horrifying confrontation with a past that has become their future!

Back Cover Blurb
Uncaged astronauts Bill Hudson and Jeff Allen seek the aid of chimp scientists Cornelius and Zira to locate their crashed spaceship — unaware that a caravan of angry apes has already set out to stop them.

But their Simian persecutors become the least of their worries when their search takes them to the lagoon of a flesh-eating mutant monster...and forces them on a daring flight to the uncharted mountains of the Ice Apes to face perils greater than they've ever known!

Back Cover Blurb
Fugitive astronauts Bill Hudson and Jeff Allen receive an urgent message from Judy Franklin, the missing member of their team who has become the captive goddess of the Underdwellers. Volcanic lava threatens to detonate the Underdwellers' atomic reactor, and the astronauts' laser is the only hope of staving off total destruction of the planet. But the laser has come into the hands of General Urko's gorillas, and Bill and Jeff's daring plan to reclaim it leads them — and Judy — into their most terrifying combats yet...forcing them into the skies and onto alligator-infested waters to escape the gorillas and lead the humanoids to safety.