| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1974 |
|
Merlin's Ring | Ballantine Books | Novel | |
| August 1974 |
|
Merlin's Ring | Ballantine Books | Novel | |
| September 1975 |
|
Merlin's Ring | Ballantine Books | Novel | |
| August 1976 |
|
The Fantastic World of Gervasio Gallardo | Peacock Press / Bantam | Nonfiction | [90] |
| November 1976 |
|
Merlin's Ring | Ballantine Books | Novel | |
| January 1978 |
|
Merlin's Ring | Del Rey / Ballantine | Novel | |
| January 1979 | Merlin's Ring | Del Rey / Ballantine | Novel | ||
| August 1981 |
|
Merlin's Ring | Del Rey / Ballantine | Novel |