In the Ravenous Dark by AdriAnne Strickland

In Thanopolis, those gifted with magic are assigned undead spirits to guard them—and control them. Ever since Rovan’s father died trying to keep her from this fate, she’s hidden her magic. But when she accidentally reveals her powers, she’s bound to a spirit and thrust into a world of palace intrigue and deception. Desperate to escape, Rovan finds herself falling for two people she can’t fully trust: Lydea, a beguiling, rebellious princess; and Ivrilos, the handsome spirit with the ability to control Rovan, body and soul. Together, they uncover a secret that will destroy Thanopolis. To save them all, Rovan will have to start a rebellion in both… Read more,