David Roberts has illustrated many children’s books, including bestsellers Ada Twist, Scientist; Rosie Revere, Engineer; and Iggy Peck, Architect.

Andrea Beaty is the author of many beloved children’s books, including the bestselling Questioners series; Attack of the Fluffy Bunnies; Happy Birthday, Madame Chapeau; and One Girl. She lives just outside Chicago. David Roberts has illustrated many children’s books, including the bestselling Questioneers series. He lives in London.