Karen Katz is an American author and illustrator of children's books. After graduating from the Tyler School of Art in Philadelphia, she attended the Yale Graduate School of Art and Architecture where she became interested in folk art, Indian miniatures, Shaker art, and Mexican art. Her first book, Over the Moon, was inspired by the experience of adopting her daughter from Central America. She has written and illustrated more than 50 picture books and novelty books including Where Is Baby's Belly Button?, Counting Kisses, and Daddy Hugs.