Many Robert Anton Wilson fans will be interested in Rudy Rucker. They were in a movie together, as this fascinating article recalls (Mr. Wilson was not at his best at the time). Rucker gained fame as an important cyberpunk author.
I mention this because Rucker's acclaimed Ware Tetralogy (four novels, the first two won the Philip K. Dick Award) is available free at Feedbooks. Rucker also has put a complete collection of his stories online as an HTML page.