Nicholas Day has been a wine salesman, a wedding cake baker, a fairground maintenance man, and a stay-at-home father. He is the author of the Sibert Medal-winning title The Mona Lisa Vanishes: A Legendary Painter, a Shocking Heist, and the Birth of a Global Celebrity , illustrated by Brett Helquist, and Nothing: John Cage and 4'33" , illustrated by Chris Raschka. His writing has also appeared in Slate , Salon , The Washington Post , The Chicago Tribune , and The Atlantic , among other publications. He lives with his family in Buffalo, NY. Hadley Hooper is a painter and illustrator whose artwork has been exhibited in galleries and museums in major cities such as San Francisco, Toronto, New York, Denver, and Santa Fe. As a picture book illustrator, she has worked with bestselling authors such as Patricia Maclachlan, Liz Garton Scanlon, and Jan Greenberg. She lives in Denver with her partner and their dog.