"In Parallel Worlds, Michio Kaku brings his formidable explanatory talents to bear on one of the strangest and most exciting possibilities to have emerged from modern physics: that our universe may be but one among many, perhaps infinitely many, arrayed in a vast cosmic network. With deft use of analogy and humor, Kaku patiently introduces the reader to variations on this theme of parallel universes, coming from quantum mechanics, cosmology, and most recently, M-theory. Read this book for a wonderful tour, with an expert guide, of a cosmos whose comprehension forces us to stretch to the very limits of imagination." --Brian Greene, Professor of Theoretical Particle Physics, Columbia University, and author of "The Fabric of the Cosmos "and "The Elegant Universe ""Kaku employs an amiable style that does much to make the story accessible even for those of us who have trouble telling the difference between superstring theory and Silly String aerosol. . . . Fascinating and sometimes downrigh