| title | ISBN-13 | year of publica- tion |
|---|---|---|
| Law Enforcement Officer: Guidebook for Background Checks and Polygraph Tests | 978-0-9720013-3-5 | 2002 |
| Law Enforcement Officer: Situational & Judgment Questions - Practice Questions & Detailed Explanations | 978-0-9720013-7-3 | 2006 |
| Law Enforcement Officer: Test Preparation Guidebook for Oral Tests & Interviews | 978-0-9720013-2-8 | 2002 |
| Master the Interview: The Ultimate Guide to Law Enforcement Interviewing | 978-0-9720013-6-6 | 2005 |