Like... my uncle was an Incubus. Not a bad one or anything, but there's a little dark glass ball called an Arclight. It's a prison for Incubi. So right when the book took his life, someone trapped his spirit in the Arclight. He was in there for a few months, and no one knew it, but then the proper Cast was spoken and he was released into a new body.

[She's not going to mention that the person who trapped his spirit in the Arclight was Ethan's dead mother, who had been Macon's lover before they separated and she met Ethan's father. Because this is already crazy as hell]