Stephen Hawking's worldwide bestseller, "A Brief History of Time", has been a landmark publication in scientific books. "A Briefer History of Time" expands on the great subjects of the original. Purely technical concepts, such as the mathematics of chaotic boundary conditions, are gone. Conversely, subjects of wide interest have now been given entire chapters of their own, including relativity, curved space, and quantum theory. CD Rom of full-colour illustrations make "A Briefer History of Time" an exhilarating addition in its own right to the literature of science.