A religion 'produced' by a human, L. A. Hubbard. Before starting the religion, the guy had said something like," starting a religion can be a source of income". I've heard that their holy book is a fiction book, and Tom Cruise is an Archbishop of the Church of Scientology.
L Ron Hubbard, an author of science-fiction books, made a bet with friends back in the 1960's or 1970's that he could start a religion based on sci-fi, convince people it was true and make millions. It worked. Their main 'religious' texts are books he himself wrote (he writes sci-fi). Now he does make millions off of mainly entertainment industry types, rich peope (regular people cant afford the fees demanded), and intellectual types.