After reading Game of Thrones I wanted to read more book series, so went with science fiction ones:

  Started with: Dune, by Frank Herbert (+ 5 books in the series)
  Continued to: Ender's Game by Orson Scott Card (+ 3 sequels)
  Now reading: Foundation by Isaac Asimov (+ 5 books)

All those are pretty great in sense of that they take set in span of thousands of years, and touch bit different ideas around society, myths, religion, morals, physical and mental technologies.

Other than that, been been enjoying some classic literature, Zen and Art of Motorcycle Maintenance, James Clavell, Haruki Murakami and books about Richard Feynman.