| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Beyond the Moon | 978-0-262-13133-9 (0-262-13133-1) | 1978 | D. K. O'Connell |
| Monsters in the Sky | 978-0-262-13153-7 (0-262-13153-6) | 1980 | Mirella Giacconi · Riccardo Giacconi |
| The Universe in Time | 978-0-262-13236-7 (0-262-13236-2) | 1989 | Mirella Giacconi |