The Craftbook is an ingame guide that tells the player how to do various things in Junk Jack. When completed, it is an almost fully comprehensive list of how to craft items in Junk Jack. It can be accessed by tapping the book icon on the bottom left of the screen while playing. Every so often a piece of paper pops out of a block, crate, or chest when it's destroyed. Each of these contain a crafting recipe for a specific item, and is added to the craftbook by tapping and holding the page. Once added, you will always have that recipe in the Craftbook.
- See Crafting for the complete book for the original Junk Jack.