Death from the Skies!:  The Science Behind the End of the World, by Philip Plait, Ph.D. — This is a terrific read for anyone who loves space, science, reason, and disaster porn as much as I do.  The Bad Astronomy blogger explores scenario after scenario with a flair for gruesomeness and a clear head for the probabilities involved.  The Washington Post called it “strangely comforting,” and they’re right.  It makes me feel about impending-albeit-statistically-improbable doom exactly the way I feel when watching Alex Filippenko talk about the same topics on The Universe:  one of these days we’re all gonna DIE, but it’s so interesting and cool that you can’t help but smile.