"The two towering achievements of modern physics are quantum theory and Einstein's general theory of relativity. Together, they explain virtually everything about the world we live in. But, almost a century after their advent, most people haven't the slightest clue what either is about. Marcus Chown, himself baffled by other attempts to explain these ideas to a wider audience, thought that there must be a better way. This book is the result. In simple languge, in a book that can be read in a morning, he illuminates the two most brilliant and exhilarating ideas of the last century."