Bill Bryson has such a curiosity about the world coupled with excellent research and fabulous story telling skills. He is able to make everything he writes about interesting and fascinating to read. He ferrets out little known characters and tells their stories as he journeys through the body. There are also plenty of stats to ponder over.

I was a bit disappointed that he didn't go into full spectrum between female and male in Chapter 17s "Into the Nether Regions", but concentrated instead on only the two ends. That chapter though could really be expanded out into an entire book. The same is probably true of most of the chapters. Picking which bits to go into the book would have been a huge task, and overall it was done well.