"Pollyanna" by Eleanor H. Porter is a heartwarming novel about an optimistic orphan named Pollyanna Whittier. After losing her parents, Pollyanna goes to live with her stern Aunt Polly in a small New England town. Despite her hardships, Pollyanna brings joy and positivity to those around her through her "glad game," in which she finds something to be glad about in every situation. Her infectious optimism transforms the lives of the townspeople and gradually softens her aunt's heart, demonstrating the power of a positive outlook and kindness.