"Mr. Stink" is a children's book written by David Walliams. The story follows a young girl named Chloe who befriends a homeless man known as Mr. Stink. He is characterized by his strong odor and mysterious past, which intrigues Chloe and leads her to learn more about him. The book explores themes of friendship, kindness, and the importance of looking beyond appearances. As Chloe and Mr. Stink develop their bond, they face challenges from her family and society, ultimately highlighting the value of compassion and understanding in a world that often judges others harshly.