Cavanaugh Encounter by Marie Ferrarella

In USA TODAY bestselling author Marie Ferrarella's sensational new Cavanaugh Justice novel, two detectives must track a lethal serial killer! 

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 realise he's met his match – offline?