The Armchair Economist: Economics & Everyday Life
Not so much a book as a series of essays, with insight to how an economist (at least one economist) approaches things. The arguments he uses are not always convincing but he's not pretending to answer everything, and it's easy to grasp--the sort of thing that you can read late at night, or get a page while you're waiting for a green light.
The main character is flat, the writing is weak, you could cut the first couple of chapters without losing anything interesting...I put the book down several times, and kept picking up later whenever I got too curious about why is this on the best sellers list? It's because of the way the writer sees God, and God is not what you expected.