Some of the best known African American poems are sonnets: Claude McKay's "If We Must Die," Countee Cullen's "Yet Do I Marvel," Gwendolyn Brooks's "First fight. Then fiddle." Yet few readers realize that these poems are part of a rich tradition that formed after the Civil War and comprises more than a thousand sonnets by African American poets. Paul Laurence Dunbar, Jean Toomer, Langston Hughes, Margaret Walker, and Rita Dove all wrote sonnets. Based...