Ezra Jack Keats (né Jacob Ezra Katz; March 11, 1916 – May 6, 1983) was an American writer and illustrator of children's books. He won the 1963 Caldecott Medal for illustrating The Snowy Day, which he also wrote. Keats wrote A Letter to Amy and Hi, Cat! but he was most famous for The Snowy Day. It is considered one of the most important American books of the 20th century. Keats is best known for introducing multiculturalism into mainstream American children's literature. He was one of the first children's book authors to use an urban setting for his stories and he developed the use of collage as a medium for illustration. Biography Jack Keats was born Jacob Ezra Katz on March 11, 1916, in East New York, Brooklyn, the third child of Polish-Jewish immigrants Benjamin Katz and Augusta Podgainy. The family was very poor. Jack, as he was known, was artistic from an early age, and joyfully made pictures out of whatever scraps of wood, cloth and paper that he could collect. Benjamin Katz, who worked as a waiter, tried to discourage his son, insisting that artists lived terrible, impoverished lives. Nevertheless, he sometimes brought home tubes of paint, claiming, "A starving artist swapped this for a bowl of soup." With little encouragement at home, Keats sought validation for his skills at school and learned about art at the public library. He received a medal for drawing on graduating from Junior High School 149. Although unimpressive-looking, the medal meant a great deal to him, and he kept it his entire life. Keats attended Thomas Jefferson High School, where he won a national contest run by Scholastic for an oil painting depicting hobos warming themselves around a fire. At his graduation, in January 1935, he was to receive the senior class medal for excellence in art. Two days before the ceremony, Benjamin Katz died in the street of a heart attack. When Keats identified his father's body, he later wrote, "I found myself staring deep into his secret feelings. There in his wallet were worn and tattered newspaper clippings of the notices of the awards I had won. My silent admirer and supplier, he had been torn between his dread of my leading a life of hardship and his real pride in my work." His father's death curtailed his dream of attending art school. For the remainder of the Great Depression