My dad gave me Dune and Cyberiad when I was like eight, that wasn't easy reading.👀😅 I don't have all the Dunes, because they're hard to find, but many are very great. Some slide to sex and weirdness and it lost grip for me. But overall the universe is spectacular.

Dune is pretty good, some of the prequels were also good (read quite awhile ago), though I've heard mixed reviews.