| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| *OP Buried Secrets: Wraith 2nd Ed Screen | 978-1-56504-603-0 (1-56504-603-X) | 1996 | |
| *OP Orphan's Survival Guide | 978-1-56504-436-4 (1-56504-436-3) | 1998 | Phil Brucato · Brad Beltane · Justin R. Achilli · Rachelle Udell |