Robert Joseph Shea (1933–1994) was an American novelist and former journalist best known as co-author with Robert Anton Wilson of the science fantasy trilogy Illuminatus!. It became a cult success and was later turned into a marathon-length stage show put on at the British National Theatre and elsewhere. In 1986 it won the Prometheus Hall of Fame Award. Shea went on to write several action novels based in exotic historical settings.
Robert Joseph Shea attended Manhattan Prep, Manhattan College and Rutgers University and worked as a magazine editor in New York and Los Angeles. In the 60's he edited the Playboy Forum where he met Robert Anton Wilson, with whom he collaborated on Illuminatus! After publishing Illuminatus!, Bob left Playboy to become a full time novelist.
Robert Shea died of colon cancer in 10 March 1994 at the age of 61.