Tactical Crime Division by Elizabeth Heiter

48 Hour Lockdown - Carla Cassidy

A school invasion turned lockdown in North Carolina is just an average assignment for the TCD unit. But it becomes personal for hostage negotiator agent Evan Duran when he learns Annalise Taylor is the teacher holed up with the students. He’ll need every resource available at TCD and every ounce of his expertise to turn this disastrous situation into a rescue mission — and if he succeeds, maybe reunite with the woman he never stopped loving.

Secret Investigation - Elizabeth Heiter

When ironclad body armour inexplicably fails and soldiers perish, the Tactical Crime Division jumps into action. Agent and former ranger Davis Rogers asks to go undercover to find the traitor responsible for the death of one of his friends, and Petrov Armor CEO Leila Petrov is happy to provide access to her company...especially once she discovers she’s being framed. But will their joint efforts be enough to uncover the truth?