| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| DARK KNIGHTS 2: The Dark Humor of Police Officers | 978-1-7199-7421-9 (1-7199-7421-7) | 2018 |
| DARK KNIGHTS 4 The Dark Humor of Police Officers: The Police Academy | 978-1-6872-9306-0 (1-6872-9306-6) | 2019 |
| Dark Knights: The Dark Humor of Police Officers | 978-1-5212-1566-1 (1-5212-1566-9) | 2017 |