- Auth/Ed: John W. Campbell, Jr.
- Year: 1940
- Price: $0.20
- Pages: 162
- Cover: Hubert Rogers
| Serials/Complete Novels | |
| Slan (Part 2 of 4) | A. E. van Vogt |
| Novelettes | |
| Farewell to the Master | Harry Bates |
| Butyl and the Breather | Theodore Sturgeon |
| Short Stories | |
| White Mutiny | Malcolm Jameson |
| The Warrior Race | L. Sprague de Camp |
| Runaway Cargo | Nat Schachner |
| Essays/Articles | |
| The Search for Zero (Part 1) | Willy Ley |