Dana Nussio 
Agent Colton’s Secret Investigation [EPUB ebook] 

Working close…too close Micah Perry always suspected his father was murdered. Now FBI agent Deirdre Colton is seeking his help investigating his former stepmother, a potential serial killer. The case is Deirdre’s chance to redeem herself with the Bureau. But Micah wants only to protect his son and find out who is sabotaging him. Working together demands they overcome their differences…and their searing attraction.