Archangel’s Kiss by Anna Santos

Aria loses her humanity after being saved by a monster she believed only to exist in horror stories. But everything isn’t what it seems when her savior becomes a handsome angel prince who awakened her ancient and deadly powers. Powers that can destroy the world, or save it.
Only true love can break the prince’s curse and stop him from turning into stone for all eternity. Despite the overwhelming chemistry between Aria and the prince, they only have thirty days to fall in love before their bond is put to the test.