| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1992 | 978-0-9634424-0-6 | Norma Tillman | Secrets for Successful Searching |
| 2006 | 978-0-9634424-1-3 | Norma M. Tillman | Private Investigation 101 |
| 2010 | 978-0-9634424-9-9 | Norma M Tillman | The Adoption Searcher's Handbook |