The last time he'd seen forensics expert Callista "Callie" MacBride, she was the target of a hit man, and FBI Agent Tom Ryan had been assigned to keep her safe…but he hadn't kept his distance. Now, when every agent in the Four Corners was on the hunt for who killed one of their own, Callie was again in danger. And like before, it was Tom playing protector-while trying to avoid their still-simmering attraction. He knew Callie resented his sudden return, but the haunted look in her eyes told him there was more to the story. And he was right-but the truth rocked him to the core…

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