"Who Sank the Boat?" is a children's picture book written by Pamela Allen. The story revolves around a group of animals, including a mouse, a rabbit, a duck, a pig, and a cow, who decide to go for a boat ride together. As they all climb into the boat, the tension builds around who might cause it to sink. The narrative explores themes of friendship and teamwork while engaging young readers with its playful illustrations. Ultimately, the story reveals that it was the combined weight of all the animals that led to the boat sinking, prompting a humorous conclusion.