Sally Lloyd-Jones is the author of several children's books, including Skip to the Loo, My Darling! A Potty Book and How to Be a Baby . . . by Me, the Big Sister, which was a New York Times bestseller. Sally Lloyd-Jones lives in New York City.David Roberts is the illustrator of many books for children, including The Dunderheads, written by Paul Fleischman, which was short-listed for the Kate Greenaway Medal; The Dumpster Diver, written by Janet S. Wong; and several acclaimed titles by Andrea Beaty, including Rosie Revere, Engineer and Ada Twist, Scientist. Born in Liverpool, he now lives in London.