Call of the Dark :

Dreams were once her escape—now they’re her prison. Anna Walker’s ability to step into dreams was nothing more than a strange quirk—until she stumbled into a nightmare and caught the attention of Azriel, a ruthless fallen angel. Forced into a deadly hunt for the legendary Horn of Gabriel, Anna is trapped between warring celestial forces, each determined to claim the relic. As dark family secrets unravel, Anna learns she’s more than a pawn—she’s the Keeper of the Holy Relics, tied to a prophecy that could decide the fate of Heaven and Hell. With time running out, she must choose: risk her soul to save humanity or watch the world fall to ruin.