Ruth Krauss (1901-1993), a member of the experimental Writer's Laboratory at the Bank Street School in New York City in the 1940s, imaginatively used humor and invented words to create some of the very first books for children that highlighted a child's inner life. She collaborated with some of the greatest illustrators in children's literature, including Maurice Sendak and her husband, Crockett Johnson. Marc Simont (1915- ) was born in Paris. When he was 19, Mr. Simont moved to America. His first illustrations for a children's book appeared in 1939. Since then, he has illustrated nearly a hundred books, working with authors as diverse as Margaret Wise Brown and James Thurber. He won a Caldecott Honor in 1950 for illustrating Ruth Krauss's "The Happy Day," and in in 1957 he was awarded the Caldecott Medal for his pictures in "A Tree is Nice," by Janice May Udry. Mr. Simont and his wife have one grown son, two dogs and a cat. They live in West Cornwall, Connecticut.