Hmm....
Let's see..
Can't do a full list right now (this lurgy is draining mentally as well as physically) but will start with
Julian May: Saga of the Exiles. Actually four books: The Many Coloured Land, The Golden Torc, The Non-Born King and The Adversary. Then on to her Galactic Milieu Series, comprising another four books: Intervention, Jack The Bodiless, Diamond Mask and Magnificat.
Then Ursula K LeGuin's Earthsea Trilogy, comprising Aizard of Earthsea, The Tombs of Atuan and The Farthest Shore.
Then I do love factual books. Mostly science-based and have a library full of them.