John Lutz 
Darker than Night [EPUB ebook] 

To catch a killer… or die trying A murderer dubbed ‘The Night Prowler’ has turned the city that doesn’t sleep into a town kept awake by terror. Unseen, he enters couples’ home. Unsuspected, he lingers until the perfect moment arrives. And then he leaves ‘gifts’ for his victims — before taking their lives.Ex-homicide cop Frank Quinn is still reeling in the wake of an elaborate set-up that ended his career. For Quinn, tracking this killer isn’t just any job — it’s a last chance to salvage his reputation. And with the body count rising, it’s up to Quinn to unlock the mystery of a madman’s past and end his bloody reign.