When A Heart Stops, Deadly Reunions Series by Lynette Eason and published by Revell.
Spunky and outgoing, nothing much bothers medical examiner Serena Hopkins--except for the thought of falling in love again. But when a serial killer is picking off her former classmates, Serena's life becomes intertwined with her old high school crush, FBI agent Dominic Allen. Is the secret she's keeping putting her next on the killer's hit list? Can she trust Dominic with the truth before it's too late? Intense, emotional, and fast-paced, When a Heart Stops will have readers up late as they race to the finish to find out what happens.