Initiate, Part 1 by Lula Monk

A forbidden romance. A murdered human. Three chances to save the people she loves.

PART 1 OF 2 After receiving her powers and proving she can hold her own against the Descended of the Divine, Mallory Cannon is slowly becoming accepted at Hornbrook Academy of the Ozarks. So when the Daughters of Lilith extend an invitation to Mallory to rush their exclusive sorority, Mallory feels like she is finally a legitimate Descended, even if her lineage is unknown.
But when a light-scorched body is discovered in the town near Hornbrook, Mallory starts to wonder if the Daughters of Lilith are more than they seem. And with the full moon approaching, another corpse may appear before Mallory knows who she can trust.