They handle the toughest cases in the most remote locations. They're the Tactical Crime Division, a specialised unit of the FBI, and in these four books, the agents pull out all the stops to ensure justice!

48 Hours Lockdown - Carla Cassidy

When TCD learns of a school invasion turned lockdown, every agent is ready to engage. With children in jeopardy, the stakes couldn't be higher. But it becomes personal for hostage negotiator agent Evan Duran when he learns Annalise Taylor is one of the captives holed up with the students in a school for the gifted. 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?

Midnight Abduction - Nichole Severn

When Benning Reeves's twins are kidnapped, the frantic father knows who can help: the Tactical Crime Division and Ana Ramirez. Even though Ana once shattered Benning's heart, the special agent is the only one he can trust. But Ana is still tormented by the unresolved case that brought them together years before - a case somehow entangled with Benning's children. It's up to the TCD and Ana to discover why...before it's too late.

Running Out of Time - Cindi Myers

To find out who poisoned medications, two of TCD's agents are tapped to go undercover posing as a married couple and infiltrate the company. But as soon as Jace Cantrell and Laura Smith arrive at Stroud Pharmaceuticals, someone ups the ante by planting explosives in their midst. Turns out that the small-town family business is hiding a million secrets. Could they unknowingly be protecting a vengeful killer?