I Can Be-Me by Leslea Newman

This book’s main concerns are; body horror, dark content, death, demonic content, divination, gore, horror, self-sacrificial death, and violence.

Third book in the Beautiful Creatures YA paranormal series: Mortal Ethan Wate and Caster girlfriend Lena Duchannes navigate a broken supernatural Order after Lena Claimed herself both Light and Dark, as demons, Incubi, and Abraham Ravenwood threaten Gatlin.