Bill Adler is an American music journalist and critic who specializes in hip-hop. Since the early 1980s he has promoted hip-hop in a variety of capacities, including as a publicist, biographer, record label executive, documentary filmmaker, museum consultant, art gallerist, curator, and archivist. He may be best known for his tenure as director of publicity at Def Jam Recordings , the period of his career to which the critic Robert Christgau was referring when he described Adler as a "legendary publicist." Wikipedia