The Journal is a handy feature that appears in the Xbox 360 version of Spelunky, and keeps track of all items, monsters and places that the player comes across in the game.
Spelunker first comes across the book before entering the mines and discovers it belonged to Yang. The journal then begins the tutorial for the player. After completing the tutorial, Yang gives Spelunker the key to the Mines, beginning their adventure. From then on, the journal will document all new items, monsters, and places Spelunker comes across, as well as noting the amount of times Spelunker dies and kills enemies.