Obsession

Hunter is a ruthless killer in the service of the Department of Defense, and he has never questioned an order. When Serena Cross watches her best friend die at the hands of a powerful alien, she is pulled into a hidden world that will do anything to stay secret. Hunter is assigned to keep her safe from his own mortal enemy, and the longer he stays close to her, the more of the rules he has lived by he starts to break.

Obsession is an adult paranormal romance set in the world of Jennifer L. Armentrout's Lux books, told in part from the point of view of the Arum, the Luxen's enemies. It can be read on its own, though readers of Lux will recognise the world. Expect action, strong language and explicit love scenes.

Hunter's dynamic with Serena has been compared by reviewers to that of Daemon and Katy in Lux, but this story is darker, more adult and more focused on the government's secret war.