King of the Fourth Planet / Cosmic Checkmate
Robert Moore Williams & Charles V. De Vet & Katherine MacLean
| First published | 1962 |
|---|---|
| Publisher | Ace Books |
| Format | dos |
| Type | Omnibus |
| Catalog ID | F-149 |
| Cover art | Ed Valigursky & Ed Emshwiller |
| Pages | 96+128 |
| Price | $0.40 |
- Cover for King of the Fourth Planet states "First Book Publication"
- Cover artist is uncredited, no visible signature. ACE Image Library credits Emshwiller.
- King of the Fourth Planet is 128 pages; ©1962
- Cover for Cosmic Checkmate states "Complete Novel"
- Cover artist is uncredited, no visible signature. ACE Image Library credits Valigursky.
- Cosmic Checkmate is 96 pages; ©1962 but is based on a magazine story, copyright, 1958, by "Street & Smith Publications, Inc."
| Page | Title | Author(s) | Type |
|---|---|---|---|
| 5 | Cosmic Checkmate | Charles V. De Vet & Katherine MacLean | Novel |
| 5 | King of the Fourth Planet | Robert Moore Williams | Novel |