"Gwendy's Magic Feather" is a novella written by Stephen King and Richard Chizmar. It is a sequel to the earlier work, Gwendy's Button Box. The story follows Gwendy Peterson, who is now an adult grappling with the consequences of her past choices and the mysterious powers of the button box she once possessed. In this installment, Gwendy receives a magical feather that grants her the ability to influence events in her life. As she navigates her new powers, she faces challenges that test her morality and the impact of her decisions on herself and others. The novella explores themes of responsibility, choice, and the weight of one's actions.