“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

“Those who might enjoy a tour of cosmology, time travel, string theory, and the universe in 10 or 11 dimensions will find no better guide than Michio Kaku, a rare individual who has undertaken research in these subject areas yet also knows well how to present this intriguing, complex material in an engaging and easily assimilable style.”- Donald Goldsmith, author of The Runaway Universe and Connecting with the Cosmos

“A highly readable and exhilarating romp through the frontiers of cosmology.”- Martin Rees, author of Our Cosmic Habitat and Our Final Century

“A roller-coaster ride through the universe—and beyond—by one of the world’s finest science writers. Michio Kaku shows that the surface familiarity of the physical world conceals a wonderland of weird entities—dark matter and energy, hidden dimensions of space, and tiny loops of vibrating string that hold the cosmos together. In the universe according to Kaku, reality is as mind-bending as the most exhilarating science fiction.” - Paul Davies, Australian Centre for Astrobiology, Macquarie University, Sydney, and author of How to Build a Time Machine

“Michio Kaku has done it again. In Parallel Worlds, he deftly transforms the frontier of physics into a kind of amusement park, where you actually have fun while reading about Einstein's relativity, quantum mechanics, cosmology, and string theory. But the real story here is how Kaku invokes these powerful tools to speculate about multiple universes and their philosophical implications for our perceptions of God and the meaning of life.” - Neil deGrasse Tyson, Astrophysicist and Director of the Hayden Planetarium, New York City, and author of Origins: Fourteen Billion Years of Cosmic Evolution