Where does great physics come from? As a young graduate student, cosmologist Stephon Alexander had a life-changing lesson in the subject. When asked by the legendary theoretical physicist Christopher Isham why he had attended graduate school, Alexander answered: "To become a better physicist." He could hardly have anticipated Isham's response: "Then stop reading those physics books." Instead, Isham said, Alexander should start listening to his dreams. This is only the first of a great many surprising and even shocking lessons in Fear of a Black Universe. As Alexander explains, greatness in physics requires transgression, a willingness to reject conventional expectations. He shows why progress happens when some physicists come to think outside the mainstream, and both the outsiders and insiders respond to the resulting tensions.