Gravity Falls: Journal 3 is a book published by Disney Publishing Worldwide, based on the animated television series Gravity Falls. Written by series creator Alex Hirsch and supervising producer Rob Renzetti, the book is a real-life adaptation of Journal 3, canonically written by Stanford Pines. First announced in October 2015 at New York Comic Con 2015, the book was released on July 26, 2016. The book became a New York Times Bestseller in 2016. Source: Wikipedia (en)