By Kevin W. Mack, Harvard University Press, Cambridge, Mass., 330 pages, $35

Ninety years ago, most schools, housing, and public accommodations in America were plagued by segregation, and there were very few African American lawyers to do anything about it. In the 35 years following World War I, however, there arose a cadre of black lawyers who, via the courtroom, sought to end segregation. In this new book, Professor Kevin W. Mack has written a collective biography of those extraordinary lawyers and the cultural struggles they faced in a profession that needed as much change as the rest of the country.