The Darkest Star (Origin #1 ) by Jennifer L. Armentrout

When seventeen-year-old Evie Dasher is caught up in a raid at a notorious club known as one of the few places where humans and the surviving Luxen can mingle freely, she meets Luc, an unnaturally beautiful guy she initially assumes is a Luxen...but he is in fact something much more powerful. Her growing attraction for Luc will lead her deeper and deeper into a world she'd only heard about, a world where everything she thought she knew will be turned on its head...