Leonard, George H
Chronological Checklist
- Sexmax (New York: Paperback Library, 1969) as by Hughes Cooper
- Somebody Else Is on the Moon (New York: David MacKay, 1976)
- Alien (Chicago, Illinois: Playboy Press, 1977)
- Someone Else Is on Our Moon (London: W H Allen, 1977)
- Alien Quest (London: Sphere, 1981)