BARBARA KANNINEN is an awardwinning Ph.D. environmental economist, a children's writer, and chair of her local elected school board. She is also a lover of shapes, and especially circles as they make the best rollers! Barbara and her husband live in Arlington, Virginia. This is her second picture book, but her flrst with Phaidon.
SERGE BLOCH is an award-winning cartoonist who has illustrated more than 300 books for children and adults.
His work regularly appears in The New York Times, The Wall Street Journal, and Time magazine, among others. If Serge were a shape, he would be a squared circle. He and his wife live in Paris and New York.