WENDELIN VAN DRAANEN is the acclaimed author of more than thirty books, including her debut picture book Gravity is Bringing Me Down , illustrated by Cornelia Li. Her novels for teens include Flipped; The Running Dream , winner of the Schneider Family Book Award; Wild Bird ; Confessions of a Serial Kisser ; and Runaway . Her books for younger readers include the eighteen-book Sammy Keyes mystery series, winner of the Edgar Allan Poe Award; The Secret Life of Lincoln Jones , winner of the Josette Frank Award; and Swear to Howdy . Van Draanen lives in California with her husband. CORNELIA LI is a Chinese born illustrator currently based in Toronto. A self-proclaimed science nerd, she has collaborated on several science-related picture books: Gravity is Bringing Me Down by Wendelin Van Draanen, The Trouble With Time Travel by Stephen W. Martin, and Hello, Opportunity by Shaelyn McDaniel.