Little Morning Star by May Sage — book slip

Lily Star Morgan has spent nineteen years under the watchful eyes of witches who treat her like a ticking time bomb. Desperate to escape, she ventures into the human world, where she feels out of place until mysterious strangers introduce her to a hidden realm. Here, she discovers a world where angels hunt her and demons become her unlikely saviors. Roth, her enigmatic protector, struggles with the knowledge of their fated bond and the secrets that could shatter her world. As danger closes in, Roth must keep Lily safe while grappling with the madness her presence incites.

First in the Wicked Crown series.