Book excerpt: Stephen Henderson has edited an anthology of the best of black poetry with an emphasis on the poetry of the 60's. But this anthology differs from others in significant ways. First, the introduction is extensive, giving tentative answers to such questions as: What makes a poem black? Who decides? What criteria does one use? The author's thesis is that the new black poetry's main referents are black speech and black music. Second, the author explores the many forms that black poets use, commenting on what is black technically in the poetry. Third, the poems anthologized include examples from the oral (folk sermon, spirituals, blues, ballad, rap) as well as the literary tradition. -- From publisher's description.