The Treehouse Books 10 Books Collection Set By Andy Griffiths: 117 Storey Treehouse: AR Level- MY 3.4 104 Storey Treehouse: AR Level- MY 3.4 91 Storey Treehouse: AR Level- MY 3.6 78 Storey Treehouse: AR Level- MY 3.5 65 Storey Treehouse: AR Level- MY 4.0 52 Storey Treehouse: AR Level- MY 3.7 39 Storey Treehouse: AR Level- MY 3.7 26 Storey Treehouse: AR Level- MY 4.4 13 Storey Treehouse: AR Level- MY 3.9 The 130-Storey Treehouse: AR Level- MY 3.8