This is book 3 of the True Blue K-9 Unit series. Multiple authors such as Laura Scott, Lynette Eason, Dana Mentink and others came together to write this seriously suspenseful series. If you enjoy police or law enforcement shows such as Blue Bloods, FBI, NCIS and so on, you will enjoy this series. I have especially enjoyed the audiobooks.
Here’s more about this book from Goodreads: