"Wouldn't your library books have something? Or maybe there's something in the police records?" It was probably a long shot, but Stiles had his monster book, so maybe somewhere in the vast stacks that was the library, there was something similar?
"Or the bookstore in town? Emma got a magic book there, maybe they've got things on Marrowood lore?" Ruby wasn't exactly 'book smart', but Belle was heavy into her books and Ruby picked up a few little pieces here and there.
"I take there's no index of reference books or something?"