"In the history and philosophy of science fields one of the most underappreciated aspects of the scientific method is the thought experiment. Almost no one studies it, and yet all scientists conduct thought experiments even when they don't realize that's what they're doing. Chris Edwards new book is the most important work on thought experiments ever written. Every historian and philosopher of science needs to read it, along with educators in general and scientists in particular. Plus, it's a gripping story about what goes on inside people's minds!" --Michael Shermer, publisher, Skeptic magazine; presidential fellow, Chapman University; author, "The Believing Brain", "The Moral Arc", "Heavens on Earth", and "Giving the Devil His Due".