Mary Brigid Barrett has written and illustrated many award-winning picture and board books, including "Shoebox Sam." In addition, she served as creative editor for "Our White House: Looking In, Looking Out" and "The Exquisite Corpse Adventure," published by Candlewick Press. She is the president and executive director of The National Children's Book and Literacy Alliance. She lives in Franklin, Massachusetts. LeUyen Pham is the author-illustrator of "Big Sister, Little Sister" and has illustrated many other books for children, including the "New York Times" bestseller "Grace for President" by Kelly DiPucchio. With Candlewick Press, she illustrated "God's Dream" by Archbishop Desmond Tutu and Douglas Carlton Abrams and "Aunt Mary's Rose" by Douglas Wood. She lives in San Francisco.