Secret Obsession (Harlequin LP Intrigue)

He didn't know which was harder: not falling for a woman who was off-limits, or protecting her from a madman… 

Scarred from the brutal murder of her fiancé, former UN translator Lyssa Cafferty sleeps with one eye open. Now a serial killer is determined to finish what he started…and she's his next target. Desperate to survive, Lyssa seeks protection from the one man with knowledge of her past. 

Noah Bradford, a cunning ex-marine, vows to protect Lyssa—along with the secret she keeps from her watchful predator. It soon becomes evident that Noah's growing attraction for Lyssa could distract him from his mission, but only together can they crack the cryptic messages of a killer. With time running out, it's uncertain who will come out unharmed—or alive.