1491: New Revelations of the Americas Before Columbus

I really suck when it comes to reading non-fiction. It always, regardless of how interesting the topic is, takes me longer to read a non-fiction book than an equally long work of fiction. All that aside, 1491 is a good read. It will challenge what you thought you knew about America before Columbus, and it might just change the way you look at the environment and the rest of your life. It's not a guilt trip, it doesn't make you feel bad for being the descendent of the Europeans who wiped out the natives with disease and war, but it opens your eyes to the wonder of the people who lived here first.
Next up is another non-fiction book (uh oh) that hits a hot topic for me at the moment, The Only Investment Guide You'll Ever Need by Andrew Tobias.