About William H. Armstrong (author)
William Howard Armstrong was an American writer of children's literature and educator, best known for his 1969 novel Sounder, which won the Newbery Medal. In 1956, at the request of his school headmaster, he published his first book, a study guide called Study Is Hard Work. Praised by critics, Sounder won the John Newbery Medal and the Lewis Carroll Shelf Award in 1970, and was adapted into a major motion picture in 1972 starring Paul Winfield and Cicely Tyson.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.