Her literary breakthrough came with Little Lord Fauntleroy (1886), the story of an American boy who becomes heir to an English earldom. The novel was immensely successful and even influenced children's fashion of the era. She followed this with A Little Princess (1905), an expanded version of her earlier novella Sara Crewe, which tells the moving story of a young girl's resilience and kindness at a London boarding school.
Her masterpiece, The Secret Garden (1911), remains a timeless classic. It follows Mary Lennox, a lonely, neglected girl who discovers a hidden walled garden and is transformed by nature, friendship, and healing. Other notable works include The Lost Prince (1915) and A Lady of Quality (1896).
Burnett's stories are celebrated for their vivid imagination, memorable characters, and uplifting themes of hope and renewal. Her books have been adapted countless times for film, television, and stage, continuing to enchant readers of all ages worldwide.