Book excerpt: Mismatched detectives pursue a serial killer linked to an online dating site in this romantic suspense mystery by a USA Today–bestselling author. Playboy detective Luke Cavanaugh O’Bannon isn’t excited to be paired with his polar opposite, introverted Francesca “Frankie” DeMarco, on a case. But when Frankie’s cousin is found dead of a suspicious drug overdose, she and Luke must work together to pursue a serial killer who’s struck again. And though they try to fight it, the two opposites attract . . . passionately! After several false leads, their investigation points them to an online dating site where Frankie, despite Luke’s objections, offers herself up as virtual bait. Will the killer reply with dinner and a deadly proposition? Will Luke realize he’s met his match—offline?