I used to read nonfiction books exclusively. I’m not sure when it started. Probably sometime in college when I – like so many delusional males my age – decided that I wanted to become rich. And so I started reading anything that could help me get rich. I read books about entrepreneurship, personal finance, productivity, business, psychology and marketing. I set aside $50 a month from my salary at my first job (a huge amount to me at the time) to buy books. It was a worthwhile investment, and I learnt a lot. But after several years, everything started to blur together. Most new books cited the same old pop psychology behavioural sciencey-type studies. They all made the same points, just packaged in different ways. (By the way, I discovered that the secret to getting rich was to work hard, be valuable, and spend less than you earn. Shocker.) After reading the same old examples for the 653rd time,...