Mortal Things

Set in a world of insatiable immortals, their eternal rivalries, and the humans trapped between them, Mortal Things is a cinematic and sweeping new fantasy from #1 New York Times-bestselling author Marie Lu
Rose Lin Fairchild didn't believe in gods, but one chose her anyway.
Rose despises Raven, the god of Death. His mysterious commands. His mercurial moods. His closed heart. But most of all, she loathes that she was forced to become his Harbinger, a human mercenary tasked to fulfill their god's every want and whim. Still, she would do it again, because being a Harbinger is the only thing keeping her best friend alive.
When a murder rocks the world of the gods, Rose is suddenly thrust into the immortal realm's spotlight as Raven's heir. This is her chance to free her friend once and for all. But in order for her to ascend, she must first prove herself to the other gods, and the one person standing in her way is a fellow Harbinger.
Etienne Beauchard is notorious for his sly wit and charming good looks. Rose can't stand that he is the one assigned to test her abilities, but as their initial hostility evolves into an intense attraction, they find that the gods' secrets go deeper than they ever expected. Something is wrong in the immortal world, something that threatens to break their bond and engulf them all in war.
As Rose and Etienne fight to uncover the truth and trust each other with their hearts, they realize that everything hinges on the same question: How far would you go to save the person you love?