"Alvin Ailey: A Life in Dance," by Jennifer Dunning; Addison Wesley. 468 pages. $30
"The Joffrey Ballet: Robert Joffrey and the Making of an American Dance Company," by Sasha Anawalt. Scribner. 464 pages. $35
It seems appropriate that dueling biographies should appear almost simultaneously on dance visionaries Alvin Ailey and Robert Joffrey; the similarities between the two men are great.