From "Soccer Moms," the legendary swing voters of the mid-1990s, to "Late-Breaking Gays" such as former Gov. Games McGreevey (out at age 47), Burson-Marsteller CEO (and campaign adviser to Sen. Hillary Clinton) Penn delves into the ever-splintering societal subsets with which Americans are increasingly identifying, and what they mean. For instance, because of "Extreme Commuters," people who travel more than 90 minutes each way to work, carmakers must come up with ever more luxury seat features, and "fast food restaurants are coming out with whole meals that fit in cup holders." In a chapter titled "Archery Moms?", Penn reports on the "Niching of Sports": much to the consternation of Major League Baseball, "we don't like sports less, we just like little sports more." The net result of all this "niching" is "greater individual satisfaction"; as Penn notes, "not one of the fastest-growing sports in America... depends substantially on teamwork." Penn draws similar lessons in areas of business, culture, technology, diet, politics and education (among other areas), reporting on 70 groups ("Impressionable Elites," "Caffeine Crazies," "Neglected Dads," "Unisexuals," "America's Home-Schooled") while remaining energetic and entertaining throughout. Culture buffs, retailers and especially businesspeople for whom "small is the new big" will value this exercise in nano-sociology. Copyright © Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.