The Legend of Zelda: Link's Awakening/Color Dungeon

The Color Dungeon contains a small yet intricate set of puzzles that you could spend hours working out if you don't pay close attention to the patterns.

First of all go to the Mabe Village library. You'll notice a book on the top of the centre shelf. Equip the Pegasus Boots and ram into the shelves, knocking the book down in the process.