"Gravity Falls: Journal 3" by Alex Hirsch is a first edition hardcover book published by Random House Children's Books in 2016. Aimed at a juvenile audience, the book falls under the genre of juvenile fiction and covers topics such as paranormal, supernatural, humorous stories, and action & adventure. With illustrations by the author himself, this edition measures 9.8 inches in length, 7.8 inches in width, and 0.9 inches in height, making it a captivating addition to any young reader's collection."