The Prince of Peril – Using his secret method Dr. Morgan projects a young Martian's astral body into a certain Harry Thorne on Earth, who then gets transported to an ancient Venus. He arrives there in the body of Prince Zinlo of Olba, and he is soon forced to escape assassination, since an ambitious noble is killing off the Royals in a bid to seize the throne. With the help of the fellow interplanetary traveler Vorn Vangal he gets to know the planet and the rules of it.