Syd Hoff, who wrote and illustrated more than 60 books for beginning readers, died at his home in Miami Beach on May 12. He was 91. With a simple cartoon style, Hoff was best known for his book Danny and the Dinosaur (Harper, 1958), which sold more than 10 million copies. Other easy-readers by Hoff include Grizzwold (1963) and The Horse in Harry's Room (1970, both Harper & Row).