Angel Fire by Ella Summers — book slip

Cadence Lightbringer, daughter of an archangel, has trained from birth to one day drink the Nectar of the gods and ascend to the angels' ranks. She's always been the perfect soldier. She's always known exactly where her life is headed.

Until she is assigned to a mission with Damiel Dragonsire, Master Interrogator of the Legion of Angels.

Powerful, paranoid, and brutally intelligent, Damiel has built up a reputation for hunting down each and every traitor hiding within the Legion's ranks. And his latest suspect is Cadence.

Convinced she is not the perfect soldier everyone believes her to be, he will stop at nothing to expose her.

First in the Immortal Legacy series.