| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Castle Dreams | 978-0-441-09414-1 | 1992 | |
| Castle Fantastic | 978-0-88677-686-2 | 1996 | Martin H. Greenberg |
| Castle for Rent | 978-0-7592-3204-4 | 2002 | |
| Castle Kidnapped | 978-0-7592-3216-7 | 2002 | |
| Castle Murder | 978-0-7592-3246-4 | 2003 | |
| Castle Perilous | 978-0-7592-3198-6 | 1999 | |
| Castle Spellbound | 978-0-441-09407-3 | 1992 | |
| Castle War | 978-0-7592-3222-8 | 2002 | |
| Castle War! | 978-0-441-09270-3 | 1990 | |
| Crooked House | 978-0-8125-2219-8 | Thomas F. Monteleone | |
| Paradox Alley | 978-1-61756-587-8 | 2011 | |
| Witchblade: Talons | 978-0-7434-3501-7 | 2002 | |
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