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"...because of its wide range in topics, it becomes extremely handy as a 'reference manual'...Kaku's book covers most of the 'hot topics' from the period 1985 through 1996 in a concise but still quite complete way, it fulfills this task in a superb way." Physicalia
"¿ A comprehensive survey of essentially all recent research undertaken in string theory and related fields¿ the author¿s ability to present such an enormous variety of material is astonishing, resulting in a book that is up-to-date and thorough." Physics Today