Enjoyable sci fi author on the order of Edgar Rice Burroughs but with a little more realism. Penned the Riverworld and World of Tiers series. Fond of puns and writing under the pseudonyms of fictional authors such as Kilgore Trout. Of the characters in his novels one will usually have his initials and birthdate. From this I'm guessing he was born in 1918 and rarely leaves Peoria. But what do I know. I rarely leave Cedar Rapids.