Since the beginning of recorded time, man and his world have been plagued by unknown forces and beings, baffled by archaeological phenomena, and haunted by prophecies that often came true.

In the classic Our Haunted Planet, John Keel brings into chilling focus strange truths about the earth and its mysterious inhabitants. It is in this book that Keel introduces his hair-raising theory of the ultraterrestrials, an unseen prehuman race that guides and misleads us, uses us for its own entertainment, and controls our every action.

Here is evidence of:
- Advanced civilizations existing thousands of years before the cave man
- The strange Men in Black
- People who vanish and reappear within hours in another part of the world
- Angels and demigods who appear and make startling predictions