Nicholas Day is the author of
The Mona Lisa Vanishes, a middle-grade
book of narrative nonfiction about the theft of the Mona Lisa. For adults, he's the author of
Baby Meets World, a work about the science and history of infancy, which Mary Roach called "a perfect book." He lives in Western Massachusetts with his family.
Chris Raschka is the Caldecott-Medal-winning and Hans Christian Andersen Award-nominated author and illustrator of dozens of books for young readers, including
The Hello, Goodbye Window,
A Ball for Daisy, and
Yo! Yes? He is also a violinist. He lives in New York City.