The Secret Garden: Frances Burnett

As Mary watched the robin, she noticed an old metal ring half-buried in the earth where the dog had been digging. She reached down and picked the ring up. But it wasn't just a ring. It was an old key, and it looked as if it had been buried for a long time.
Mary stood up and looked at it. She felt almost frightened. 'Perhaps it has been buried for ten years,' she said in a whisper. 'Perhaps it is the key to the secret garden.'
Mary Lennox arrives from India to live with her uncle in Yorkshire. She is lonely and unwanted. Then one day, Mary finds a secret garden...