The Truth to Uncover (BillDip)

A/N: This book is a sequel to A Code to Decipher. If you found this book first, please go read the other one before reading this one. Thank you! ~*~*~*~*~*~*~*~ What do you look for if you don't know what you're trying to find? How will you ever get there? With nothing but a slip of paper to go off of, Dipper Pines is...