Arthur Clark and Rama series
Note: this entry has moved.
I finished the whole series (Rendezvous with Rama, Rama II, Garden of Rama and Rama Revealed) in 45 days. It's THAT good!An incredible journey not only to outer space and the unknown, but also deep inside, a critic analysis of the very human nature, our fears and beliefs, the role of God, economics, society, and much more!
A really deep story, which gave me plenty to think about, not so much about the future, but about today, our world and my own introspection.
Now I started the Foundation series from Isaac Asimov. I read first and second books really fast, in a couple weeks... very interesting so far. Now I'm stuck trying to get the third book in spanish :S.