In a straightforward and honest manner, Porter explores life's challenges—such as poverty, loneliness, and illness—and concludes that a cheerful child's presence can ease both social and personal resentment. Pollyanna encourages people to focus on the positive aspects of life rather than the sad and negative ones. The book is not a sermon, nor does it adopt a preachy tone. Instead, it is a captivating adventure romance with many familiar yet engaging elements. The story follows a poor orphan girl who arrives in an unfamiliar place, resides in the "big house on the hill," and, through her enthusiasm and curiosity, navigates and transforms her new surroundings. Pollyanna is spirited and free from prejudice, making her the only person in the small New England town open to interacting with everyone. Her actions are never cruel; even when she breaks a rule, it often leads to a positive outcome for someone else.

One reason to read this book is to experience firsthand one of the most popular and influential works of the early twentieth century. The term "Pollyanna" has come to represent a sentimental and simplistic view of life, yet Pollyanna's vision of love and happiness remains relevant in an era characterized by cynicism and superficial sophistication. Pollyanna continues to be one of literature's most irrepressible and lively characters, whose actions inspire those facing challenges to persevere.