Gravity Falls has a new Bill Cipher book for adults - Polygon

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.

NEW BOOK OF BILL CIPHER SNEAK PEEK BREAKDOWN! (New Gravity Falls Book)

Gravity Falls' Is Getting a Companion Book Centered on a Key Character

BILL CIPHER WROTE A BOOK FOR ADULTS

Bill Cipher, Gravity Falls Wiki

TRUST NO ONE

Bill Cipher Hardcover Journals for Sale

Gravity Falls Bill Cypher Summoning Cross Stitch Pattern

Books - Polygon

Alex Hirsch

Hardcover Journal

Gravity Falls Inspired Book of Cipher, RED | Hardcover Journal