

From the best-selling author of The Elegant Universe and The Fabric of the Cosmos comes his most expansive and accessible book to date—a book that takes on the grandest question: Is ours the only universe? There was a time when “universe” meant all there is. Everything. Yet, in recent years discoveries in physics and cosmology have led a number of scientists to conclude that our universe may be one among many. With crystal-clear prose and inspired use of analogy, Brian Greene shows how a range of different “multiverse” proposals emerges from theories developed to explain the most refined observations of both subatomic particles and the dark depths of space: a multiverse in which you have an infinite number of doppelgängers, each reading this sentence in a distant universe; a multiverse comprising a vast ocean of bubble universes, of which ours is but one; a multiverse that endlessly cycles through time, or one that might be hovering millimeters away yet remains invisible; another in which every possibility allowed by quantum physics is brought to life. Or, perhaps strangest of all, a multiverse made purely of math. Greene, one of our foremost physicists and science writers, takes us on a captivating exploration of these parallel worlds and reveals how much of reality’s true nature may be deeply hidden within them. And, with his unrivaled ability to make the most challenging of material accessible and entertaining, Greene tackles the core question: How can fundamental science progress if great swaths of reality lie beyond our reach? Sparked by Greene’s trademark wit and precision, The Hidden Reality is at once a far-reaching survey of cutting-edge physics and a remarkable journey to the very edge of reality—a journey grounded firmly in science and limited only by our imagination. [][1]
A glimpse inside

Greene emphasizes that space and time are not static backgrounds but dynamic entities that can stretch, warp, and ripple. Drawing from Einstein’s relativity, he shows how gravity is not a force pulling objects but a manifestation of curved spacetime. This reimagining fundamentally changes our understanding of motion, causality, and the interconnectedness of events in the universe.
The book delves into quantum mechanics, highlighting its counterintuitive implications: particles can be in multiple states at once, and the act of observation can influence outcomes. Greene explains how quantum phenomena challenge our classical intuitions and raise deep questions about the nature of reality, causality, and even free will.
Ratings at a glance
- 1Space and Time Are Dynamic
- 2Quantum Weirdness and Reality
- 3The Illusion of Time's Flow
- 4The Multiverse Hypotheses
- 5String Theory and the Quest for Unification
Popular quotes from The Fabric of the Cosmos
“If experience has taught us anything, it’s that, with rare exception, things are not as they seem.”
