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...
Mabel is in her bubble prison, and of course Dipper, Wendy, and Soos try to save her, but Bill gets there before them.
The unknown secrets of Gravity Falls has been weighed on Dippers shoulders, Mabel willing to help only made Dipper feel bad for putting her in so much danger. Once he starts ignoring her, she looks for another person to be with. ♡MaBill♡