As they approach traditional retirement age, baby boomers and their demographics again loom large in the economies of developed countries, this time largely by the threat of their retiring. The authors, consultants for decades to corporations dealing with exactly such issues, identify the three major age cohorts in the labor force, specify their particular needs, and describe ways to keep each engaged. They examine the reasons for what they believe is a coming shortage in skills as well as labor, the untapped resource of workers over 55 and the end of retirement as we know it, the tensions between family and work in the mid-career cohort, and the peculiar ways of the young, such as job-hopping in seeking more control of their work lives. They keys to handling each, it seems, are flexibility in management and making work meaningful for workers of all ages. Annotation ©2006 Book News, Inc., Portland, OR (booknews.com)