Rating: 
Summary: easy to read, a little to easy...
Review: I wish that he had gone more into depth explaining strings, but that is not the kind of book it is. it is an overview on higher dimentions. but it is definitally fun to read. once you hear the story about him and his parents, a football feild, and 30 miles of wire... you will be on the floor.
Rating: 
Summary: An extremely complex topic magically simplified
Review: Kaku demonstrate in this book he's great talent of presenting an extremelly difficult and fascinating scientific topic in very simple words that takes you fluidly throughout the book and leave you at the end thinking that you got it !!
Rating:
Summary: Marvelous!
Review: Fabulous book. It plainly explains theoretical physics of the higher dimensional type. Another good book if you like this one is the Elegant Universe by Brian Greene
Rating: 
Summary: The Lighter Side of Space
Review: Good overview of space in the solutions of science. Though the book suggests upper dimensions as simplifications to lower dimensional enigmas, it generally provides little to grasp in the ascent of these upper realms. Good introductory book, with a first half summarizing relativity and early 20th century physics, and a second half dominated by speculation. Sorry, I was unfortunate to have read other more recent books on the current scientific scenary, and found this one to be far too lacking on substance. Would be a good book to begin a venture into current trends, but if you've kept up your reading, this might add little to your game plan but vocabulary.
Rating:
Summary: Great Stuff
Review: I'm a fan of science but never took "real" physics in college. This book covers a lot of ground with regard to the history of physics over the past 200 years. Along the way he does a great job of explaining the underlying concepts in a way that is understandable without being ponderous. Readable quantum physics for the average person.
Rating: 
Summary: Didn't grab me
Review: I usually like books about weird science, but I have to say that this one didn't grab me-- maybe because I got to it right after reading Kip Thorne's book on Black Holes and Time Warps. It's ok, but didn't seem special.
Rating:
Summary: Serious Review
Review: Hyperspace by Michio Kaku is a nice introduction to Superstrings theory and why the theory is important and beautiful. However, the book have some errors (you can see by the bibliography that the author doesn't have a big knowledge outside pure particle physics) and is not well-written as it could be: many topics are repeated during the book because there is no organization (like chronological). It appears that the author wrote what came in his mind. Anyway, the information about particle physics in this book is almost unique in popularizations and the author have a very good way of exposing particle physics to public.
Rating:
Summary: Best book to rectify your "scientific" bias
Review: This one book did change my life in a way perhaps no other scientific book did. The examples were very illuminating. I liked and shared the author's childhood experiences. The Flatlander/Spacelander example was great. This example has to go to your heart before you can understand the non-understandable!! The young ones should know this before they become fixed to some scientific dogma. A must-read book.
Rating:
Summary: Outlines a leading candidate for the Theory of Everything
Review: Hyperspace is a book strongly focused on higher-dimensional space-time theories such as superstring and Kaluza-Klein-type. The 10 dimensional theory promises to vastly simplify the laws of nature and end our view of a three dimension universe. Kaku manages to compile lots of information in a very readable and fascinating book. You will understand how 10-D theories are basically simple and geometric, despite their mathematical complexity (which actually opened up new areas of mathematics).Higher dimension theories allow us to reduce enormous amounts of information into a concise, elegant fashion that unites the two greatest theories of the 20th century: Quantum Theory and General Relativity. Michio covers the basics of the theory, and its future implications for the future of physics and science, and even writes a few pages on the debate between the reductionism and holism in nature, and the aesthetic relation among physics, mathematics, religion and philosophy. The book flows very smoothly, never burying the reader under too many technical facts. It introduces higher dimension concepts, its relationship with currently accepted theories and the unification of all forces in ten dimensions. Part 3 of the book starts getting heavier on astrophysics, covers Wormholes and potential gateways to other universes, black holes, parallel universes, time travel and colliding universes. Never Hollywood material, but the typical Stargate fan will probably still love this part. :-) Part 4 ends the book with thoughts on how mankind would can rule the universe if Hyperspace can be mastered, discussing the fate of the universe and its civilizations. Subjects like Entropy death, escape thru hyperspace and universal colonization are covered. Interesting, but lots of early speculation. It is true that superstring theories currently appear impossible to test experimentally and may end up in the trash bin, but I don't think that limits this title's interest or renders it worthless. Michio's book is very well written and organized, making extremely difficult higher physics sound almost easy. Beware however, that this isn't really a good title for a complete beginner, and far from complex enough to leave some other readers satisfied. If you have some knowledge of the basics, you will be left with the impression that the ideas covered are simple, but it will only be an illusion; Very few people in the world fully master all the subjects covered. If having to understand the Riemann Metric Tensor is enough to make you run, you better keep away from this title. No knowledge in math is necessary, but of course, if you know your college math, you'll know what's happening, in some parts instead of having to just believe Kaku's word. :) Just being able to grasp the general beauty of hyperspace science is still well worth the time. In parallel, you will hear some stories about mathematicians, events, and many curious episodes that have influenced modern science; Kaku sometimes diverges a bit from the main subject, and ends up telling stories, some about his childhood, and many about famous scientists (For instance, when dealing with Hilton's cubes, Kaku spends a few paragraphs telling us about Hilton's habits and the fact that he was a bigamist, the scandals, etc). This isn't really a problem, as the stories are usually interesting and directly or indirectly related to the subjects. Kaku did manage to write a great laymen's (well, almost) book about higher dimensional physics and cosmology. Not many do it as well. Everybody remembers Hawkin's "A Brief History of Time" and also the now classic "The Elegant Universe". Hyperspace has its place next to these. The discussion about God grasped my interest, but that didn't last long. I would have dropped the subject, as Michio is definitely not qualified to get into it, and I did not get the book to read a version of Kant's arguments that have been refuted to exhaustion. Note that I'm not questioning Michio's conclusions, just saying that there are far better titles on these matters and that the author should have focused on what's he's good at. But, that little stain is no major problem, In general, very enjoyable title, also complete in notes, references, suggested readings and has a good index. Highly recommended.
Rating:
Summary: Excellent
Review: This is excellent. I came to this book with very little background on the subject...a glancing knowledge of relativity and of quantum mechanics. Michio Kaku presents the material in a very accessible manner, leading the reader the history and evolution of the theories that lead up to Superstring theory. This has the advantage of giving the reader a framework and a context within which to place each additional bit of knowledge and the advantage of humanizing the story. I strongly recommend this book for anyone with even a slight interest in the topic, whatever your background may be. For those who have no knowledge of the subject, Michio Kaku is an excellent and amusing teacher. For those who understand Hyperspace and Superstring theory, this may give you an historical context for your knowledge and present you with ways to explain this complicated subject to others. Kudos to Kaku and O'Keefe
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