| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| The Beyond | 978-0-399-20015-1 | 1967 | Jean Sutton |
| The Boy Who Had the Power | 978-0-399-20026-7 | 1971 | " |
| The Programmed Man | 978-0-399-20188-2 | 1968 | " |
| The Ships of Durostorum / Alton's Unguessable | 978-0-441-76096-1 | 1970 | Kenneth Bulmer |