How does a ghetto evolve? Too often that question is not only not answered but not asked. And yet unless the ghetto is studied, unless the forces which shaped it are probed, the answers to present day racial strife will not be found. Gilbert Osofsky has made such an investigatory examination of Harlem-- the area whose name is a synonym of ghetto. He traces Harlem's history from its beginnings as a Black Eldorado with wide, tree lined streets and modern apartments, to a community ashamed of everything about it, everything it touched. The handling is alive and sensitive, and it conveys dimensions of problems which statistics cannot. His book deserves attention.