Beverly Atlee Cleary ( born April 12, 1916) is an American writer of children's and young adult fiction. One of America's most successful living authors, 91 million copies of her books have been sold worldwide since her first book was published in 1950. Some of Cleary's best known characters are Henry Huggins and his dog Ribsy, Ramona Quimby and Beezus Quimby, and Ralph S. Mouse.