At the risk of overgeneralizing, the posters here are a pretty thoughtful and interesting bunch. I'd like to know what were the books that most influenced your way of thinking and looking at the world. I'd also be interested in the books that made you think differently about a subject with whom you were already familiar.
I'm pretty ecumenical about text source so feel free to share fiction, nonfiction, textbooks, scholarly articles, or particularly profound Snapple caps. In addition, please share the nature of the impact the work had on your outlook.
Alright, now talk nerdy to me.