The Way We Work (2008)

Macaulay turns the same explaining instinct on the human body, and the result is the best single book here for understanding how the body's systems depend on each other. Across more than 300 pages it moves from cells and DNA through breathing and circulation, digestion, the nervous system, immunity, bones and muscles, and finally reproduction. It is denser and quieter than The Way Things Work, with fewer jokes, so it suits a teenager or adult with some basic biology reading steadily rather than a quick browse. Settle in with it chapter by chapter.