This massive book enhances your ability to learn. Entwined with the words is an extremely powerful magical effect that grants a 20% bonus of the base XP of Heroic tier dungeons, increased to a 50% bonus the first time you complete them. This effect will have no effect in Epic tier dungeons or for characters that are level 20 or higher, and will not stack with other Tomes of Learning (but will replace them if greater). It will stack with all other sources of XP bonuses, such as Experience Elixirs. This effect persists through True Reincarnation.