Any Way the Wind Blows by Rainbow Rowell

Powerless former Chosen One Simon Snow and his vampire boyfriend Baz Pitch attempt to rebuild their relationship while investigating a cult leader claiming to be the magical world's new savior. 

This book contains: activism, alcohol, alternate sexual ideologies, animal cruelty (supernatural), anxiety, cults, dark content, death/grief, demonic content, depression, derogatory terms, discrimination, divination, drugs, explicit sexual activities/nudity, explicit crude sexual dialogue, gore, murder, parental neglect, profanity (pervasively vulgar), sexism, smoking, stalking, theft, toxic relationships, vaping, victim shaming and violence.