Philip Jose Farmer is a very well known fantasy author which surely plays in one league with sir tolkien. The most successful books he wrote were the ‘riverworld’ ones which were released 1971. So far he wrote over 70 books and 100 short stories in his long career, which started in the late 1940s and won several highly respected awards.
A well known design studio, here in germany, knocked on my door and asked for the rights on a pic to use it on the german re-release of the riverworld books. Book one to be precise. I’m pretty proud about that.