Current Recommended Reading:
Harry Potter and the Methods of Rationality - Eliezer Yudkowsky
Guns, Germs, and Steel: The Fates of Human Societies - Jared Diamond
The Dictator's Handbook: Why Bad Behavior is Almost Always Good Politics - Bruce Bueno de Mesquita
The Dresdon Files - Jim Butcher
Worm - wildbow
Horus Heresy Novels - various

Shatterpoint