Let the laughter rip with the first three Doctor Proctor's Fart Powder books from "New York Times "bestselling author Jo Nesbo, available in one boxed set that includes a whoopee cushion! Join Dr. Proctor, Nilly, and Lisa as they have a ton of fart-tastic fun--with the help of Dr. Proctor's magical fart powder, of course! This gas-tacular boxed set comes complete with a whoopee cushion for bonus blasts of laughs, and includes the first three books in the series: "Doctor Proctor's Fart Powder," "Bubble in the Bathtub," and "Who Cut the Cheese?"