Cuphead: Don't Deal with the Devil (book)

Cuphead: Don't Deal with the Devil is no ordinary children's book; it's actually a magical relic used to travel to the Inkwell Isles. According to Teen Girl in a Toon World, the book was stashed away in an antique shop on display before being stolen by Ashley Masenado on her 13th birthday.

Appearance
The book is yellow with Cuphead and Mugman on the front. It has the book's title in big letters on the front. After being drained, the outside and inside of the book are now black and white and grey, making it look like a traditional 1930's cartoon.

The book is ???  long and ??? wide. The book lost its colors once Ashley Masenado and her friends Vexy Notting and Julia Sacajewelia got transported to the isles. It depicts the promotional poster for the Cuphead game on the cover.