Brian Selznick is the Caldecott Medal-winning creator of the New York Times bestsellers The Invention of Hugo Cabret, adapted into Martin Scorsese's Oscar-winning Hugo, Todd Haynes's Wonderstruck, and The Marvels. Among the celebrated picture books Selznick has illustrated are the Caldecott Honor Book The Dinosaurs of Waterhouse Hawkins by Barbara Kerley, and the Sibert Honor Book When Marian Sang by Pam Muñoz Ryan. His books appear in over 35 languages. He has also worked as a bookseller, a puppeteer, and a screenwriter. He divides his time between Brooklyn, New York and San Diego, California.

David Serlin is a writer, editor, and historian who teaches at the University of California, San Diego. He is the author or editor of numerous books and articles for adults. Baby Monkey, Private Eye is his first book for children. He divides his time between Brooklyn, New York and San Diego, California.