Planet of the Apes Omnibus 4

The fourth omnibus of classic Planet of the Apes novels.
When men discovered that the Planet of the Apes was their own Earth, it was only the beginning of the most incredible adventure of all time...
VISIONS FROM NOWHEREStranded on an unknown planet, astronauts Bill Hudson, Jeff Allen, and Judy Franklin are assaulted by fantastic visions that render them helpless. When Judy vanishes and Bill is captured by an army of bloodthirsty gorillas, they realize they've entered a world where apes rule and mankind lives under a leash...
ESCAPE FROM TERROR LAGOON
Bill Hudson and Jeff Allen seek the aid of chimp scientists Cornelius and Zira to locate their wrecked spaceship, unaware a group of angry apes have already set out to stop them. But this is the least of their worries when their search takes them to the lagoon of a flesh-eating mutant monster...
MAN, THE HUNTED ANIMAL
Bill Hudson and Jeff Allen receive an urgent message from Judy Franklin, who has become a 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.