Rebels on the red planet! An Earthman Harry Thorn exchanges personalities with an ancient Martian and pursues a vicious criminal (another Earthman who had been sent earlier) who seeks to destroy Martian civilization.
Theres also a race of yellow aliens apart from the hot-looking humanoids, and these guys have a death-ray which becomes important to the conflict. Considered by many to be the only true equal of Edgar Rice Burroughs, Otis Adelbert Kline was a master of the sword and planet genre.
