One of the wonderful thing about good stories is that they echo through your brain, reverberating off whatever other ideas and thoughts happen to be in there at the time.
When I first downloaded Company Eight, by Matthew Pearl, I was intrigued by the chance to read about a piece of history I had literally never before considered: how our modern fire departments came to be. This is still how I pitch the story to friends I think should read it. It is a well-researched and fascinating look at how something we all take for granted came to be.