In his first book ever, the father of string theory reinvents our concept of the known universe and mans unique place within it. The beginning of the 21st century is a watershed in modern science, a time that will forever change our understanding of the universe, Leonard Susskind contends. Several decades ago, Susskind introduced the revolutionary concept of string theory to the world of physical science. In doing so, he inspired a generation of physicists who believed that the theory would uniquely predict the properties of our universe. Now, in his first book ever, Susskind argues that the very idea of such an elegant theory no longer suits our understanding of the universe, and that our narrow 20th-century view of a unique universe will have to give way to the much broader concept of a gigantic cosmic landscapea megaverse, pregnant with new possibilities. His other contributions to physics are too numerous to mention, but his recent victory in an argument with Stephen Hawking over the nature of black holes made headlines everywhere.