Sendak served in the U.S. Army during the Second World War and later worked for Emerson Radio and Television. He credited his father with inspiring his storytelling talent through his regular bedtime folk tales. Two of his books, Circus Girl (1957) and The Happy Rain (1956), were illustrated by his brother, Maurice.[2] Two other books were illustrated by Mitchell Miller Jr. (b.1947), son of popular conductor Mitch Miller, whom Maurice Sendak described as "one of the most gifted of the new generation of illustrators."[3][4][5][6] Jack's 1971 book, The Magic Tears, illustrated by Miller, won the Children's Book Showcase award.
Jack Sendak died on February 3, 1995, at the age of 71, in New Jersey. He was survived by his wife.[2]