| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 1972 |
|
The Lost Continent | Ballantine Books | Novel | |
| March 1972 | The Lost Continent | Ballantine Books | Novel | ||
| September 1973 |
|
The Lost Continent | Ballantine Books | Novel | |
| 1974 |
|
The Lost Continent | Pan / Ballantine | Novel | |
| September 1977 |
|
The Lost Continent | Del Rey / Ballantine | Novel | |
| October 2001 |
|
Fantasy of the 20th Century: An Illustrated History | Collectors Press | Nonfiction | 32 |
| October 2002 |
|
Art of Imagination: 20th Century Visions of Science Fiction, Horror, and Fantasy | Collectors Press | Omnibus | 540 |
| November 2004 |
|
Fantasy of the 20th Century: An Illustrated History | Barnes & Noble Books | Nonfiction | 32 |