highest level enchantment books

It would be interesting if all the chests found in game structures contained enchantment books with levels higher than those obtainable through the enchantment table; this would encourage players to explore the world in search of these advanced enchantments. In this way, exploration would become a more rewarding activity; furthermore, it would create a balance between using the enchantment table and hunting for rare loot, enhancing the game's sense of adventure.