If you're just getting into books some good shouts for fantasy are anything from Brandon Sanderson, Malazan Book of the Fallen (Steven Erickson), and The Magician (Raymond E Feist).
If you want sci-fi, some of the standard choices are Dune, Foundation, Three Body Problem etc. - although if I had to give personal recommendations I would go with Lord of Light or The Book of the New Sun.
If you want some "heavier" fiction, Ulysses is excellent.