Nicholas Day

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.