Manly (U. of Rochester) works on experiments at high-energy accelerators around the world, investigating the structure of matter and nature's forces. He offers students and general readers an overview of the different multiple universe concepts--drawn from quantum mechanics, cosmology, string theory-based cosmology, and ideas about a mathematics-based reality bordering on the religious--along with the background to understand them informally. He also discusses the degree to which the ideas are based on science and the extent to which they are truly revolutionary. Annotation 穢2011 Book News, Inc., Portland, OR (booknews.com)