Sibylline by Melissa de la Cruz

In a magical academy plagued by ritualistic murders, three students utilize forbidden magic and a graphic sexual ritual to revive one of their own from death..

This book contains: alcohol, dark content, death, deception, divination, dubious consent, emotional distress, explicit sexual activities/nudity, gore-graphic, grief, necrophilia-adjacent content, potentially erotica content, potentially prurient content, profanity (minor), toxic relationships and violence.