FiftyThree, the developer behind the iPad-exclusive drawing app Paper, and notebook manufacturer Moleskine have introduced a collaborative product named “Book”, which combines drawings done on the iPad app into a custom-printed journal notebook, reports The Verge. The product is hand-stitched with formatting done in the 4:3 ratio of the iPad screen, and is printed on Italian-made premium matte paper. Each Book can contain up to 15 pages of drawings from the app, and can also sport a custom cover of a design the user chooses.