Frances Hodgson Burnett 
Secret Garden — With Audio Level 3 Oxford Bookworms Library [EPUB ebook] 

A level 3 Oxford Bookworms Library graded reader. This version includes an audio book: listen to the story as you read. Retold for Learners of English by Clare West. Little Mary Lennox is a bad-tempered, disagreeable child. When her parents die in India, she is sent back to England to live with her uncle in a big, lonely, old house. There is nothing to do all day except walk in the gardens — and watch the robin flying over the high walls of the secret garden . . . which has been locked for ten years. And no one has the key.