"Gwendy's Button Box" is a novella written by Stephen King and Richard Chizmar. It follows the story of a young girl named Gwendy Peterson who encounters a mysterious box that grants her the power to control life and death through its buttons. Each button has a specific consequence, leading Gwendy to grapple with the moral implications of her choices. Set in the fictional town of Castle Rock, the story explores themes of temptation, responsibility, and the impact of power on an individual's life. As Gwendy navigates her newfound abilities, she learns valuable lessons about the weight of her decisions and the importance of self-control.