1776, by David McCullough
Thank god for audiobooks. With all my current self-assigned tasks I'm not getting my book fix any other way.
If you don't know who David McCullough is, he narrated Ken Burns's documentaries on the civil war and on baseball (if you don't know those, I can't help you). He's got a great voice for listening to, a real storyteller's voice. You could listen to it for hours, which I guess I did.