Frances Hodgson Burnett 
The Secret Garden 

What little girl can turn a whole household upside down and breathe new life back into a strange, old manor? The wonderfully contrary, strong-willed, angry, misunderstood Mary Lennox.
When Mary Lennox is sent to Misselthwaite Manor to live with her uncle, everybody says she is the most disagreeable-looking child ever seen. It is true, too. Mary is pale, spoilt and quite contrary. But she is also horribly lonely. Then one day she hears about a garden in the grounds of the Manor that has been kept locked and hidden for years.
And when a friendly robin helps Mary find the key, she discovers the most magical place anyone could imagine…
The perfect heart-warming story for young readers and young-at-heart readers alike.
“The book is brim full of magic and joy“ Sunday Telegraph