H. C. · Harry A. Cole · Harry Cauley
| title | ISBN-13 | year of publica- tion |
|---|---|---|
| Policeman's Lot | 978-0-00-636317-0 | 1981 |
| Policeman's Patch | 978-0-00-636458-0 | 1982 |
| Policeman's Patrol | 978-0-00-636647-8 | 1983 |
| Policeman's Story | 978-0-00-636843-4 | 1985 |
| The Blue Apprentices | 978-0-00-617124-9 | 1986 |