River of Eternity
 River of Eternity is an early version of what became the Riverworld series by Philip José Farmer.The original Riverworld story was a 150000-word novel titled Owe for the Flesh which ended with the protagonist (called Richard Black in this version) finding the tower at the end of the river. In the mid-1950s Farmer entered it in a science fiction novel contest run by Shasta Publishers and subsidized by Pocket Books. He won the contest but received no money.