1. The 13-story treehouse - GRIFFITHS, ANDY

2. The 26-story treehouse - GRIFFITHS, ANDY

3. The 39-story treehouse - GRIFFITHS, ANDY

4. The 52-story treehouse - GRIFFITHS, ANDY

5. The 65-story treehouse - GRIFFITHS, ANDY

6. The 78-story treehouse - GRIFFITHS, ANDY

7. The 91-story treehouse - GRIFFITHS, ANDY

8. The 104-story treehouse: dental dramas & jokes galore! - GRIFFITHS, ANDY

9. The 117-story treehouse: dots, plots & daring escapes! - GRIFFITHS, ANDY

10. The 130-story treehouse: laser eyes and annoying flies - GRIFFITHS, ANDY

11. The 143-story treehouse: camping trip chaos! - GRIFFITHS, ANDY

12. 156-story treehouse: holiday havoc! - GRIFFITHS, ANDY