| Title | Type | Date | Role |
|---|---|---|---|
| On the Origin of Humanoid Life in Our Galaxy | Essay | 1968-04 | Author |
| Visit to a Weird Planet | ShortStory | 1968-09 | Author |
| Crank Letter | ShortStory | 1969-04 | Author |
| Ray Bradbury and the A.T.&T. | Essay | 1971-01 | Author |
| The Night of the Twin Moons | Book | 1976-04 | Author |
| The Logic of Chance | ShortStory | 1976-05 | Author |
| Time of a New Beginning | ShortStory | 1976-12-15 | Author |
| The Vulcan Academy Murders | Book | 1984-11 | Author |
| The IDIC Epidemic | Book | 1988-02 | Author |
| Survivors | Book | 1989-01 | Author |
| Metamorphosis | Book | 1990-03 | Author |