Denying the Daemon by L.A. Boruff

Halo has mastered the art of secret-keeping, especially from her closest pals. Not a soul knows about her glory days in ancient Egypt, and as the Trickster King’s right-hand woman, she’s been too busy babysitting shifters to spill the beans.
When Luce, a daemon she’s pre-judged as a bad influence, waltzes into her life, all bets are off. With the ominous shadow of the Formless ones creeping closer, Halo and Luce are forced to pool their not-so-compatible talents.
As they grudgingly work together, Halo can’t help but find Luce dangerously attractive, much to her chagrin. With the lines between friend and foe getting fuzzier by the minute, Halo must confront her secret-laden past and decide if opening up is worth potentially saving their world or just a recipe for a disaster.