Crockett Johnson was the pen name of cartoonist and children’s book illustrator David Johnson Leisk (October 20,1906–July 11, 1975). He is best known for the Harold series of books, which began with Harold and the Purple Crayon, and for the comic strip Barnaby. He was married to the children’s book author Ruth Krauss, with whom he collaborated on several books, including The Carrot Seed.