This dynamic bestselling author/illustrator duo captures the ups and downs of everyday life in this chapter book offering fun and perfectly narrated short stories—for kids who can already read, like the Great One, or for kids who are learning to read, like the Pain. Friend or Fiend? is the fourth book in a quartet of hilarious and warm-hearted stories that showcase the joys, the fun, and the frustrations of sibling rivalry and devotion, as seen through the eyes of those sassy siblings, the Pain and the Great One.