In novels and films, the most common scientist by far is the mad one. From H. G. Wells’s Dr. Mo­­reau to Ian Fleming’s Dr. No to Stanley Kubrick’s Dr. Strangelove, scientists are portrayed as evil geniuses unrestrained by ethics and usually bent on world domination. Over the past two years, as I struggled to write my own novel about physicists and their quest for the Theory of Everything, I often worried that I was falling prey to this stereotype myself. It is incredibly difficult to create fictional scientists who are neither insane villains nor cardboard heroes. To faithfully depict the life and work of a researcher, you need to immerse yourself in the details of his or her research, and very few writers have done this task well.