Andrea Beaty is the bestselling author of Rosie Revere, Engineer and Ada Twist, Scientist as well as the novels Dorko the Magnificent and Attack of the Fluffy Bunnies. She has a degree in biology and computer science and spent many years in the computer industry. She now writes children's books in her home outside Chicago. David Roberts has illustrated many books, including Ada Twist, Scientist ; Rosie Revere, Engineer ; and Happy Birthday, Madame Chapeau.
He lives in London, where, when not drawing, he likes to make hats.