Bill Cipher Book

Hyperion Avenue

The Book of Bill: Alex Hirsch                    

Independently published

Bill Gravity Journal: TRUST NO ONE! BLACK HARDCOVER SPECIAL EDITION - Create your own Fall adventure !!!

Planetamex

El Libro de Bill / The Book of Bill              

Disney

Gravity Falls: Dipper's and Mabel's Guide to Mystery and Nonstop Fun!

Wildside Press

Flatland: The book that inspired Bill Cipher from Gravity Falls

Journal of my encounters with Bill Cipher, an unofficial Gravity Falls book (English Edition)

Independently published

Bill Gravity Journal: BLACK HARDCOVER LIMITED EDITION !!! - Create your own Fall adventure !!! LINES NOTEBOOK 9 x 6 / DIARY / JOURNAL / PROP / PRANK / HALLOWEEN / CHRISTMAS GIFT !!!

Egmont Comic Collection

Willkommen in Gravity Falls - Tagebuch 3: Das Buch zur Serie

Austin Macauley

Bill Tutte Codebreaker: and His Battle with Hitler's Secret Cipher

Egmont Comic Collection

Willkommen in Gravity Falls - Verschollene Legenden: 4 neue Abenteuer