What's on Your Nightstandred Right Now?

One book that influenced me alot was, you know, just the first a i text book that i ever saw. Another book that i've read more recently is gery diamond's er er, guns, gems and steel. I could go on for hours, i know we're coming up to our time limit here. So i just have two questions left: What books would you say had the most impact on you in terms of, do you keep coming back to them or tha change the way you see the world?