| The horn of time | 20 |
| Three Hearts and Three Lions | 20 |
| Planet of no return. | 17 |
| Best of Poul Anderson | 16 |
| Tau Zero | 12 |
| Brain Wave | 12 |
| There Will Be Time | 10 |
| The High Crusade | 8 |
| The Corridors of Time | 8 |
| The star fox. | 8 |
| The Dancer from Atlantis | 8 |
| The King of Ys | 8 |
| Flandry of Terra | 7 |
| Operation Chaos | 7 |
| Fire Time | 7 |
| Shield | 7 |
| The Winter of the World | 6 |
| Trouble Twisters | 6 |
| Time and stars | 6 |
| Beyond the Beyond | 6 |
| The enemy stars | 6 |
| The Rebel Worlds | 6 |
| Trader To The Stars | 6 |
| Ensign Flandry | 6 |
| The broken sword. | 6 |
| The Guardians of Time | 6 |