Includes authors with at least 6 novels, short fiction, poems or collections:
| Debut Year | Author | Number of Titles |
|---|---|---|
| 1938 | Kent Casey | 8 |
| 1938 | John L. Chapman | 10 |
| 1938 | John Christopher | 123 |
| 1938 | Basil Copper | 124 |
| 1938 | Edgar Parin d'Aulaire | 50 |
| 1938 | Ingri d'Aulaire | 50 |
| 1938 | M. P. Dare | 15 |
| 1938 | Lester del Rey | 149 |
| 1938 | Stanley Foster | 7 |
| 1938 | Donald Graham | 21 |
| 1938 | Dale Hart | 8 |
| 1938 | Shirley Jackson | 147 |
| 1938 | Moritz Jagendorf | 16 |
| 1938 | Edith Jakobsson | 8 |
| 1938 | Ejler Jakobsson | 8 |
| 1938 | Malcolm Jameson | 82 |
| 1938 | Tommaso Landolfi | 36 |
| 1938 | Charles Eric Maine | 40 |
| 1938 | Louise Mellema | 11 |
| 1938 | John Victor Peterson | 20 |
| 1938 | Henry Rawle | 10 |
| 1938 | Milton A. Rothman | 20 |
| 1938 | Alexander Samalman | 9 |
| 1938 | Dan Storm | 20 |
| 1938 | Theodore Sturgeon | 304 |
| 1938 | Arthur Tofte | 23 |
| 1938 | Helen Weinbaum | 11 |
| 1938 | Ursula Moray Williams | 11 |
| 1938 | Richard Wilson | 121 |