Civil War in a Nutshell?

I’m looking for a good book about the American Civil War. Sure, I studied the basics back in high school, but I missed the Ken Burns series, and I realize that I don’t really know much about this pivotal event in US history. So I want a book that will give me the basics — the before/after historical context and the events of the war — in a reasonably concise form. Should be easy to find, right? Nope. Amazon lists 9535 books on Civil War history, but the ones that seem to get the best reviews are either 900 pages long or multiple volumes. I don’t want to read about a single battle or figure, I want an overview.

Anyone out there have suggestions?