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.
Marie Hall Ets
‡ As an illustrator Ets won the annual Caldecott Medal in 1960 for "Nine Days to Christmas" and she was one of the runners-up five times from 1945 to 1966 (exceeded only by Maurice Sendak). Since 1971 the runners-up are called Caldecott Honor Books, but some runners-up had been identified annually and all those runners-up were retroactively named Caldecott Honor Books. The number of Honors or runners-up had always been one to five, and it had been two to four since 1994, until five were named in 2013 and six in 2015. The Honor Books must be a subset of the runners-up on the final ballot, either the leading runners-up on that ballot or the leaders on one further ballot that excludes the winner.