Book excerpt: Spencer's discussion encompasses the music and writings of a wide range of important figures, including James Weldon Johnson, Harry T. Burleigh, Roland Hayes, Marian Anderson, Alain Locke, William Grant Still, R. Nathaniel Dett, and Dorothy Maynor. He argues that the singular accomplishment of the Harlem Renaissance composers and musicians was to achieve a "two-tiered mastery" promoted by Johnson, Locke, the Harmon award, and Crisis and Opportunity magazines.