| Gates of the Universe (with Gene DeWeese) | 1975 |
| Now You See It/Him/Them (with Gene DeWeese) | 1976 |
| To Renew The Ages | 1976 |
| But What of Earth? (with Piers Anthony) | 1976 |
| Charles Fort Never Mentioned Wombats (with Gene DeWeese) | 1977 |
| Lazer Tag: Adventure No. 1 High Spy | 1987 |
| Series Contributed To | |
| Amazing Stories (with Gene DeWeese) | |
| 4. Nghtimare Universe | 1985 |
| Man From U.N.C.L.E. (writing as Thomas Stratton) | |
| 11. The Invisibility Affair | 1967 |
| 12. The Mind-Twisters Affair | 1967 |
| Anthologies Contributed To | |
| "Queen of the Timies" - Alternate Worldcons (with Gene DeWeese) | 1994 |