| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Protectors: A Photographic History of Police Departments in the United States | 978-0-9974251-0-9 (0-9974251-0-5) | 2016 | Foreword by William J. Bratton · former Police Commissioner · City of New York |
| Unsolved: Cold-Case Homicides of Law Enforcement Officers | 978-0-9974251-1-6 (0-9974251-1-3) | 2018 | |