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Synopsis
The Road to Reality is the most important and ambitious work of science for a generation. It provides nothing less than a comprehensive account of the physical universe and the essentials of its underlying mathematical theory. It assumes no particular specialist knowledge on the part of the reader, so that, for example, the early chapters give us the vital mathematical background to the physical theories explored later in the book. Roger Penrose's purpose is to describe as clearly as possible our present understanding of the universe and to convey a feeling for its deep beauty and philosophical implications, as well as its intricate logical interconnections. The Road to Reality is rarely less than challenging, but the book is leavened by vivid descriptive passages, as well as hundreds of hand-drawn diagrams. In a single work of colossal scope one of the world's greatest scientists has given us a complete and unrivalled guide to the glories of the universe that we all inhabit.

From the Publisher
'A truly remarkable book-this is just the sort of book that could inspire mathematical awakenings' Sunday Times

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45 Reviews 5 star:  (17) 4 star:  (8) 3 star:  (5) 2 star:  (4) 1 star:  (11)           Average Customer Review (45 customer reviews)		Share your thoughts with other customers:
Most Helpful Customer Reviews   81 of 84 people found the following review helpful: Elegant or Wonderful?, 10 Aug 2004 By  Ed (Exeter, Devon United Kingdom) - See all my reviews This review is from: The Road to Reality: A Complete Guide to the Laws of the Universe (Paperback) This is probably the best book I've ever read. It's a cross between a popular science book and a physics textbook. No other popular science book contains this level of technical detail; therefore no other pop-sci book really explains what's going on. Of course all this knowledge comes at a cost. I found it really hard going at times, and this was meant to be some light summer reading after my exams. (I've just finished a master's degree in theoretical physics). Lots of common things like Fourier series and complex analysis (which I thought I understood) are explained in a brilliant way from a different perspective, which I had never thought of before. And why had no one ever shown me diagrammatic tensor notation? That would have been very useful. Any way it's all in here. The exercise are in the foot notes and are very useful to help you understand the ideas in greater depth, I think many of the problems are for people with some training in the subject though. However you don't need a degree to read this book just an interest in the subject and a lot of patience would probably go a long way. This is one of those books where the more you know the more you get out of it. It took Penrose 8 years to write apparently but I'm amazed one person could write it at all. I'm only half way through reading it, it touches on most areas of theoretical physics and I believe will become a classic. The only complaint I would have (and this may be because I'm reading an early release) is that there are a few typos, particularly in the figure caption equations. However that shouldn't detract from an amazing work that goes where no pop sci has gone before...  Comment | Permalink | Was this review helpful to you? (Report this)   38 of 39 people found the following review helpful: The road right back to the book shop., 4 April 2006 By A Customer This book certainly seems to polarise opinions. I have yet to read a neutral review of it. It is either praised to the skies or condemned as useless. It doesn't take a Penrose (or an Aristotle) to point out that these two views are logically incompatible!. I have a good deal of sympathy with the reviewer who got as far as chapter 6 before giving up in disgust. I have got just a little bit further at the cost of considerable effort. However I do not think the book is useless and I'm sure some readers will genuinely enjoy it. There are a few problems. Firstly the blurb is plain dishonest. Secondly Penrose's preface in which he states that it is possible to read the book and gain something from it whilst skipping most of the maths is hopelessly naive and optimistic. Make no mistake about it, if you do not enjoy Maths for its own sake you are not going to get very far with this book. Like several of your other reviewers I studied Maths at school and enjoyed it . I then went on to study Medicine at university and have always nursed a vague sense of inferiority about my "school boy" Maths. I believe anyone who tackles the book with this kind of background is going to struggle pretty badly and more specifically they are going to get stuck on chapter 7 ("Complex number calculus"). Personally I read the first 6 chapters with enjoyment and even managed to do some of the examples. It started me thinking again about the Maths I had learned long ago and I found that I enjoyed doing so. Further Maths books were purchased and most outside observers are of the opinion that I have wasted a good deal of time (I have however enjoyed myself in a strange sort of way.) I now understand (to my own satisfaction at least) most of the first 6 chapters. It has to be said that I learned very little of this from actually reading Penrose's book on its own. I found further reading essential. Penrose presents only the barest bones of the subject and expects a great deal from the reader in terms of thinking for him or herself. There is absolutely no "spoon feeding". The prose is dense and takes some getting used to, however I think he does manage to communicate a sense of excitement in the subject. The approach is unconventional but I have found that if something is already well understood ( by learning it at a more leisurely pace elsewhere) then Penrose's take on the subject can be quite illuminating. For example his approach to the exponential form of a complex number via an informal but convincing definition of a complex logarithm is far easier to grasp intuitively than the usual power series proof. So far so good. No more school Maths after chapter 6! Before reading this book I had never heard of complex calculus. Perhaps I flatter myself but I don't honestly believe anyone unfamiliar with this subject will gain anything more than a headache by reading chapter 7. I read and re read this chapter several times before giving up and skipping to chapter 10 ("Surfaces") which seemed to be related. I got on better with chapter 10 and realised I had completely missed the point of chapter 7. Why the hell didn't he put chapter 10 first? Having said this chapter 10 is still very difficult and I got so frustrated with it that I went out and bought an introductory text on vector calculus. After reading this (and this stuff is pretty challenging in spaces that are flat. No one is going to glide through this) and then doing a bit more research on the web I think I have got as far as seeing what Penrose is trying to explain in chapters 10 and 12 ("n-dimensional manifolds") .This of course is not the same thing as actually understanding it. If I ever do understand it (unlikely) then chapter 19 ("The classical fields of Maxwell and Einstein", 29 pages in all) should be a walk in the park ,I will have finished with classical physics for good and can start the difficult stuff! Penrose clearly hopes that by explaining the essential concepts behind a subject and leaving out what (to him) are unnecessary computational details the reader will gain enough insight to grasp the essentials. As I have said before the man is an optimist. Intelligent people can sometimes take intuitive short cuts with subjects they understand well. Beginners don't stand a chance. If you enjoy Maths but don't have a degree in it ,are very well motivated to understand some of modern physics and have grown inpatient with the usual popularisations by all means buy this book. I don't honestly think most people will finish it. If however your curiosity is aroused and in defiance of common sense you become infected with Penrose's incurable optimism you will buy a lot more books, blunt a few pencils and severely test the patience of your family and friends. You might even learn something. Alternatively you could always stain it with coffee, make spurious notes in the margin and display it prominently on your shelf where everyone will see it. I suspect this last motivation will sell a lot of copies!  Comment | Permalink | Was this review helpful to you? (Report this)   27 of 28 people found the following review helpful: Not For The True Layman, But Fantastic Otherwise, 10 April 2006 By A Customer I agree with other reviewers that this book is not appropriate for anyone without a degree in the physical sciences. However, people who have done a degree, even in physics at a prestigious university often come out not really knowing what's going on. Courses almost exclusively focus on examineable material and so the beauty of the whole thing is lost in routine calculations and derivations. If this sounds unhappily familiar, this book is probably for you. For me, it was probably the most engrossing book I have ever read. Penrose explains how all the various theories and theorems interact to form a beautiful and coherent whole, but does so by building on the maths rather than the broken analogies pop-science usually uses. It is probably worth bearing in mind that he does have a rather unusual interpretation of even the most basic physical theories. The interpretations come directly from the maths, so there is certainly no crackpottery going on, though it can be a bit of work to connect back to what you already know from university. But when you do, it is the most fantastic feeling in the world, and