The article presents information on the book "A Generation of Change: A Profile of America's Older Generation," by Jacob S. Siegel. This book is one of a census monograph series on the population of the United States in the 1980s produced for the National Committee for Research on the 1980 Census. The committee is promoting a coordinated program of census analysis by interdisciplinary groups of scholars. This book arrived on my desk as I was preparing a paper on the future of home-based services for elderly people and was surrounded by special reports from the U.S. Census Bureau, the American Association of Retired Persons, and similar sources. The fact that this book was based on the 1980 census at first unnerved me, knowing how policy analysts, politicians, and students want the most up-to-date numbers. Much of the information in the book, however, has been updated to the mid-1980s by use of the current population reports, other government studies, and the work of specialists in gerontology.