Anne Fine 
The Stone Menagerie 

Ally really doesn»t want to go with his mum on her weekly visit to his fragile aunt Chloe at the big Victorian hospital – until he discovers a hidden garden in the grounds. Here a young homeless couple have made themselves a home. Suddenly Ally begins to discover a new way of looking at the world – and to understand his aunt and some of her sensitivity. But there is another side to the coin, too, and the young couple must also be prepared to adapt to suit their changing circumstances . . .