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.

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 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 ...

The town of Gravity Falls, Oregon, may be fictional, but many fans were left wondering something: Was the Bill Cipher statue real, and was this one last mystery for the fandom to solve?

Alex Hirsch's Gravity Falls was the focus of Disney's "How NOT to Draw," with Bill Cipher looking to make a dimension-hopping deal.

Gravity Falls’ big villain, Bill Cipher, is getting his own book written by series creator, Alex Hirsch. And it’s for older readers! Out in July.

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 ...

Disney’s How NOT to Draw series was recently infiltrated by demonic Gravity Falls triangle Bill Cipher in “How NOT to Draw Grunkle Stan”.

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.