Minecraft wiki entry for Enchanting, associated text: Enchanted books can be made by using an enchanting table to enchant a book. (They can also be found in generated chests, purchased with emeralds from a villager librarian, or looted by fishing rod.) The book can receive multiple enchantments of any type, but only enchantments appropriate to a given item type may be applied to that item. For example, the same book may receive Respiration and Power enchantments, but the Respiration enchantment is lost if the book is applied to anything but a helmet, and the Power enchantment is lost if the book is applied to anything but a bow.