Theory on why Flight of The Cromernockle is important.
I'm seeing a lot of discourse about the Cromernockle book. Did someone from the town write it? A previous incarnation of Jade or Tabitha? Elgin's grandmother? Maybe Julie travelling back in time?
I have a different theory.
There's nothing special about the book, except the fact that Ethan believes in it.
No bible has ever entered the town, that's an established fact.
I think books of faith can harm the town somehow, and the MIY or whoever's in charge fucked up royally by letting Ethan enter with a book about magic he has complete and utter conviction in.
The Lake of Tears? Wasn't even a real thing until he arrived. It came straight out of the book.
I think that's why the crows freaked out when Tilly started using the tarot cards. They were just random pieces of paper until she started dealing them with the intention of forming a narrative.