Important! I don't own gravity falls, or the characters in this book! Alex Hirsh owns gravity falls, and the characters in gravity falls. I only own this book. Thanks! Happy reading! jumped at the loud, startling knock. turning, I grabbed one of Mabel's grappling hooks. "well it'll at least scare them.." I said to myself. as I slunk to the door. "he-hello?" I threw the wide door open, to be faced with....All Rights Reserved