In one of the games
the player find some tomes, reading each of them one stat is permanently rise. The tomes that rise wisdom are 3, for the other stats there only 1 tome each.
Sadly in RL we don't find such books, but sometimes we find some books that somehow bring some improvement in our lives.
So my answer is what are the 3 Tomes of Wisdom in your life?
They can be books related to religion, like the Holy Bible or the Noble Quran, or books dealing with philosophy, but also novels or other books that usually are not rated as sources of wisdom but in some way had helped you to understand better yourself, the world you live in or anyway improve your life.
And they can be only 3, or less, is possible that you have not find all the Tomes. Refrain from posting long lists, just 3, the most important for you.