The Art of War - Sun TzuWhat book changed the way you viewed the world the most?
The Prince - Machiavelli
The Book of 5 Rings - Miyamoto Musashi
They didn't necessarily change the way I viewed the world, but they perfected the way I viewed it. I really like how they see the world for what it is, instead of what it should be.
Also: this is post no. 4000