The Tibia Tomes are a special collection of books, written by ancient wizards. They hold some of the mystic secrets of Tibia. Although the red and purple tomes are still currently lootable, the other three colors have been very scarce and are extremely expensive to purchase, found in hands of collectors in old worlds, like Antica, Nova and Eternia. The Tome of Knowledge is a new item and was added with the Christmas Update 2009. This tome can be found in a few places around the area of Zao and is only really valuable to those players who collect them, as part of a quest.