A review of The Atlas of Ethnic Diversity in Wisconsin, written by Kazimierz J. Zaniewski and Carol J. Rosen. It is the first book of its kind to be published about a single state. The atlas is designed to provide the reader with a geographic and demographic overview of the state's many ethnic groups. A series of maps and graphs describes each group that has 400 or more members, from African Americans and Armenians to Vietnamese and Welsh. For each ethnic group--62 in all--a two-page spread provides graphical information.