In the early 1980s, Koman collaborated with Andrew J. Offutt on Offutt's Spaceways series for Playboy Press (which was sold to Berkley Books in mid-stride). Koman wrote two novels in the series, to which Offutt added his own scenes, then edited and published the novels under the series name "John Cleve". These paperbacks are long out of print. Covers for both novels were painted by Ken Barr.[2]
A community activist, Koman was instrumental in preventing the 1988 destruction of the Disneyland Monorail System's last bubble-topped Mark III monorail (Old Red), generating a one-man public-relations campaign that resulted in nationwide news coverage.[3] The Walt Disney Company subsequently saved, restored, and converted the historic monorail fuselage into a street-legal promotional vehicle.[4]
Koman's 1995 story collaboration with Brad Linaweaver, "The Light That Blinds", features an occult battle between Aleister Crowley and Adolf Hitler.[5]
Koman has appeared as an extra in several films, including Star Trek: The Motion Picture, CyberZone, Rapid Assault, Fugitive Rage, Mom’s Outta Sight, Billy Frankenstein, KidWitch (in which his daughter, Vanessa Koman, played the title role), Red Dragon, The Hot Chick, and A-List (film). On November 15, 1998, he was the winner on the game show Inquizition.