Ruth Krauss was one of the most widely celebrated children's book authors of all time. Her long list of award-winning books includes The Carrot Seed, The Happy Day, A Hole Is to Dig, Open House for Butterflies, A Very Special House, and many others. Her books continue to be read and cherished by children throughout the world. Maurice Sendak's books have sold over 50 million copies and have been translated into more than 40 languages. He received the 1964 Caldecott Medal for Where the Wild Things Are and is the creator of such classics as In the Night Kitchen, Outside Over There, Higglety Pigglety Pop!, and Nutshell Library. In 1970 he received the international Hans Christian Andersen Medal for Illustration, in 1983 he received the Laura Ingalls Wilder Award from the American Library Association, and in 1996 he received a National Medal of Arts in recognition of his contribution to the arts in America. In 2003, Sendak received the first Astrid Lindgren Memorial Award, an annual international prize for children's literature established by the Swedish government.