Bookshelf
Block ID: 47
A Bookshelf serves as a decoration or a very inefficient furnace fuel. Bookshelves naturally occur in "libraries" inside strongholds, and NPC villages.
Breaking a bookshelf will drop 3 books currently. This used to only occur if the block was broken by an explosion, but has been fixed since the 1.9 pre-release. A single bookshelf can be crafted by arranging three wooden planks, one in each square, across the top and bottom rows, and three books in the middle row.
advertisem*nt
If bookshelves are placed near a enchantment table, it allows the player to make stronger enchantments.