The Ghost Map: The Story of London's Most Terrifying Epidemic - and How It Changed Science, Cities, and the Modern World - Steven Johnson An engrossing read despite the author's tendency to wander away from his core subject every now and then. Not the very best of the genre but far from being the worst, The Ghost Map is worth picking up. (Just not if you're eating, as another reviewer has already stated.) I could have done without the added epilogue after the conclusion, not just because it's repetitive but because it presented a lot of biased conjecture that didn't really tie into the subject at hand.

Read it, don't eat while you read it, and skip the "epilogue."