A tie-in to the two-season series Gravity Falls, The Book of Bill delves into Bill Cipher's origins and where he landed after the show's finale.

The Book of Bill is a new companion book to the show Gravity Falls, focusing on the character Bill Cipher. The book will reveal Bill's origin story, his villainous agenda, and the secrets of the ...

Written by series creator Alex Hirsch, The Book of Bill is a humorous tie-in that reveals more about Gravity Falls and the mysterious Bill Cipher.

Alex Hirsch talks about Bill Cipher, Summerween, Gravity Falls, and which character deserves a 50 Shades of Gray-style spinoff. The Book of Bill is out now.

The covers for The Book of Bill, the upcoming Gravity Falls tie-in book, throws things back to the original animated series from Alex Hirsch.

Gravity Falls ’ villain Bill Cipher has characteristically sown chaos into the animated series’ fanbase in the wake of his haunted adult-themed tome The Book of Bill hitting bookstore shelves ...