Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Shield of Protection | 2019 | Maggie K. Black | Buy |
| 2 | Justice Mission | 2019 | Maggie K. Black | Buy |
| 3 | Act of Valor | 2019 | Maggie K. Black | Buy |
| 4 | Blind Trust | 2019 | Maggie K. Black | Buy |
| 5 | Deep Undercover | 2019 | Maggie K. Black | Buy |
| 6 | Seeking the Truth | 2019 | Maggie K. Black | Buy |
| 7 | Trail of Danger | 2019 | Maggie K. Black | Buy |
| 8 | Courage Under Fire | 2019 | Maggie K. Black | Buy |
| 9 | Sworn to Protect | 2019 | Maggie K. Black | Buy |
| 10 | True Blue K-9 Unit Christmas | 2019 | Maggie K. Black | Buy |
| 11 | Brooklyn Christmas | 2020 | Maggie K. Black | Buy |
Maggie K. Black’s True Blue K-9 Unit series follows members of a canine police unit across eleven books published between 2019 and 2020. The series begins with Shield of Protection and moves through titles like Justice Mission, Act of Valor, and Blind Trust, each pairing law enforcement officers with their K-9 partners in different cases. The books carry a strong suspense element, with titles such as Deep Undercover, Trail of Danger, and Courage Under Fire reflecting the high-stakes situations the characters face.
The series also includes holiday-themed entries. True Blue K-9 Unit Christmas (2019) and Brooklyn Christmas (2020) close out the run with seasonal stories set in the same world. Readers who enjoy fiction that combines police procedural elements with working dogs will find plenty to like here, and the large number of entries gives the series room to develop its cast across many connected storylines.