Magic Book of Knowledge
The Magic Book of Knowledge is a magic book that only appears in Rayman Junior. It apparently holds the answers to every question in the whole of Rayman's world. It is guarded by the Magician, who keeps it in his cottage. In Rayman Junior, which is set after the events of the original game, Mr Dark returns and steals the Magic Book of Knowledge. The Magician and Betilla the Fairy then send Rayman on a quest to recover it. Rayman eventually finds it in Mr Dark's Lair, the game's final level.