Let the laughter rip with the first five books in the Doctor Proctor’s Fart Powder series from New York Times bestselling author Jo Nesbø—now available together in a collectible boxed set!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 boxed set includes: Doctor Proctor’s Fart Powder Bubble in the Bathtub Who Cut the Cheese? The Magical Fruit Silent (but Deadly) Night