From the renowned theoretical physicist and national bestselling author of The God Equation comes the first book-length exploration of the most exciting development in modern physics- the theory of 10-dimensional space. "Among the best of its genre to appear in recent years...What a wonderful adventure it is, trying to think the unthinkable!" -The New York Times Book Review The theory of hyperspace, which Michio Kaku pioneered, may be the leading candidate for the Theory of Everything that Einstein spent the remaining years of his life searching for.