The 13th Immortal / This Fortress World
| First published | 1957 |
|---|---|
| Publisher | Ace Books |
| Format | dos |
| Type | Omnibus |
| Catalog ID | D-223 |
| Cover art | Ed Emshwiller & Ed Valigursky |
| Pages | 129+190 |
| Price | $0.35 |
• The 13th Immortal is 129 pages. ©1957
- • The cover has "Complete Novel".
• The artist is not credited; no visible signature; ACE Image Library credits Valigursky
- • The cover has "abridged".
• The artist is not credited; EMSH is on the artwork
| Year | Reviewer | Publication |
|---|---|---|
| 1957 | Anthony Boucher | The Magazine of Fantasy and Science Fiction, August 1957 |
| Page | Title | Author(s) | Type |
|---|---|---|---|
| 5 | The 13th Immortal | Robert Silverberg | Novel |
| 5 | This Fortress World | James E. Gunn | Novel |