"Mr. Tiger Goes Wild" is a children's picture book written and illustrated by Peter Brown. The story follows Mr. Tiger, a refined tiger who feels constrained by the rules of his civilized animal society. He longs for freedom and adventure, leading him to embrace his wild side. As Mr. Tiger begins to act more like his true self, he surprises his friends and ultimately inspires them to join him in celebrating their wildness. The book conveys themes of self-expression and the importance of being true to oneself, making it a delightful read for young audiences.