User blog comment:PurplePenguin/The Grunkle Stan Mystery/@comment-67.54.166.74-20130210222043/@comment-174.26.198.82-20130316010843

I think grunkle stan is secretly the author of all the books and his secret vending room holds the first book, and he also purposley made dipper hang up signs so he could find the book. Also there is magic junk of magicalness in the secret room, which Gidion wants.