This book is literally just all of the Gravity Falls Au's that I have come across. It's to give everyone a good idea of what's actually out there. This book is now marked as complete. Let me know if you want a Book 2!
All is normal in Gravity Falls until Bill smashes an orb which pulls Mabel and him into another dimension, forcing them to work together to find their way back to Earth. ~ UPDATE February 7, 2015: There is a sequel to this book! It is called "Gravity Rises". ~ Edit: When I wrote this I knew nothing about the Will Ciph...