Thought-provoking. I don't know if I want to give this a three or a four. It was mainly a four but the last part dragged. There's a lot about the virtues and struggles of a career in physics, which would be enjoyed more by people who are in physics or are closely related to someone in physics. At the beginning there seemed to be promise of a Big Bang Theory likeness but this turned out to be not the case. I think it could've been edited down. It's 264 pages in before the second instance of the multiverse, or the second reality of these people, is presented. (There are three versions of reality in this book).