Picture book
In 1938, the American Library Association (ALA) began presenting annually the Caldecott Medal to the most distinguished children's book illustration published in the year. The Caldecott Medal was established as a sister award to the ALA's Newbery Medal, which was awarded to a children's books "for the most distinguished American children's book published the previous year" and presented annually beginning in 1922. During the mid-forties to early fifties, honorees included Marcia Brown, Barbara Cooney, Roger Duvoisin, Berta and Elmer Hader, Robert Lawson, Robert McCloskey, Dr. Seuss, Maurice Sendak, Ingri and Edgar Parin d'Aulaire, Leo Politi, Tasha Tudor, and Leonard Weisgard.
Kate Greenaway Medal
In 2014, "This Is Not My Hat" by Jon Klassen won both the Greenaway Medal and the American Caldecott Medal, which recognises a picture book illustrated by a U.S. citizen or resident. This is the first time the same book has won both medals. The recently common practice of co-publication makes a double win possible. Indeed, "This Is Not My Hat" was released in Britain and America on the same day, 9 October 2012, by Walker Books and its American subsidiary Candlewick Press.