Robert Guralnick is an American author and music historian, best known for his biographies of influential musicians and his work on the history of popular music. He has written acclaimed biographies of artists such as Sam Cooke, Elvis Presley, and others, providing in-depth insights into their lives, careers, and impacts on music. Guralnick's writing is notable for its detailed research and narrative style that captures the essence of the music and culture of the times.