This book discusses a framework to understanding basics of physics that focuses on what can and cannot happen, which the author terms counterfactuals, as opposed to what does happen (such as Newton's laws). It goes a great job of explaining information theory and quantum information. I am not sure the new framework is that novel though. At times it appeared so, but at other times I was left confused since many things the author say are counterfactual properties appear to be able to be expressed equally well through time reversible models. I wouldn't say this book expanded my knowledge set that much, except for the explanations about information theory, which in itself might be worthwhile since the book is quite short.