The answer to the crossword is 'ASHE', which is the author of the book 'A Hard Road to Glory: A History of the African-American Athlete'. Arthur Ashe was an American professional tennis player who won three Grand Slam titles and was the first African-American male to win a Grand Slam singles title. He was also an activist for social justice and a humanitarian, and his book is a comprehensive history of African-American athletes from the late 19th century to the present day.