Diviner

A curse befalls the magical ivy league in this YA dark academia romantasy, the sequel to Sibylline by #1 New York Times bestselling author Melissa de la Cruz. After the near collapse of Sibylline-the crown jewel of the magical ivy league-Raven, Atticus, and Dorian return for their second semester as students. They finally have access to the education they've wanted all their lives. But an insidious darkness has wormed itself into the Ivy.
It surfaces when a wrathful creature appears on campus, and before long, it devolves into the mysterious disappearance of spellbooks. The spells themselves are vanishing with them, extending far beyond campus and threatening the collapse of the world's magic system. Tumult at Sibylline should bring the trio closer together. But Raven pulls away, becoming more and more entangled with a secret society dealing in dangerous arcane arts.
With only each other to lean on, Atticus and Dorian must try to restore the world's magic from inside of Sibylline's walls-all while fighting to salvage their relationship with the person they love the most.