Amazon.com description: Product Description: What happens when your imaginary friend becomes your imaginary enemy? New York Times bestselling author Brandon Mull and No.1 New York Times bestselling illustrator Brandon Dorman team up in this new children s picture book that explores the meaning of friendship and imagination. Like many kids his age, Chad has an imaginary friend. His friend was Pingo. The two would fight ninjas, brew magical potions, and float in zero gravity. Each day was a fun-filled adventure, until Chad decided he was too old to have an imaginary friend. But Pingo wasn't ready to leave Chad alone, and started tormenting him and causing all kinds of mischief. Can this once inseparable duo ever be friends again? Paired with charming illustrations, Pingo is a delightful read-out-loud picture book for children ages 3 and up.