**A journey into the mysteries and meaning of quantum theory: “Gorgeously lucid text . . . easily the best book I’ve read on the subject.” —** The Washington Post *“Anyone who is not shocked by quantum theory has not understood it.”* Since Niels Bohr said this many years ago, quantum mechanics has only been getting more shocking. We now realize that it’s not really telling us that “weird” things happen out of sight, on the tiniest level, in the atomic world: rather, everything is quantum. But if quantum mechanics is correct, what seems obvious and right in our everyday world is built on foundations that don’t seem obvious or right at all—or even possible. An exhilarating tour of the contemporary quantum landscape, *Beyond Weird* is a book about what quantum physics really means—and what it doesn’t. Philip Ball offers an up-to-date, accessible account of the quest to come to grips with the most fundamental theory of physical reality, and to explain how its counterintuitive principles underpin the world we experience. Over the past decade it’s become clear that quantum physics is less a theory about particles and waves, uncertainty and fuzziness, than a theory about information and knowledge—about what can be known, and how we can know it. Discoveries and experiments over the past few decades have called into question the meanings and limits of space and time, cause and effect, and, ultimately, of knowledge itself. The quantum world Ball shows us isn’t a different world. It is our world, and if anything deserves to be called “weird,” it’s us. “Weighs up the competing interpretations, and the misconceptions, that have attached themselves to quantum theory in its 100-year history. . . . [A] laudable achievement.”— *Sunday Times* “Ball is one of the finest contemporary writers about science. . . . His prose is a pleasure to read.”— *Wall Street Journal*