**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.