This is the The Treehouse Books Series 12 Books Collection Set by Andy Griffiths & Terry Denton – 13-Story to 156-Story Treehouse book set, includes:

The 13-Story Treehouse: Monkey Mayhem!
ISBN: 9781250070654

The 26-Story Treehouse: Pirate Problems!
ISBN: 9781250073273

The 39-Story Treehouse: Mean Machines & Mad Professors!
ISBN: 9781250075116

The 52-Story Treehouse: Vegetable Villains!
ISBN: 9781250103796

The 65-Story Treehouse: Time Travel Trouble!
ISBN: 9781250102478

The 78-Story Treehouse: Moo-Vie Madness!
ISBN: 9781250104830

The 91-Story Treehouse: Babysitting Blunders!
ISBN: 9781250104861

The 104-Story Treehouse: Dental Dramas & Jokes Galore!
ISBN: 9781250233257

The 117-Story Treehouse: Dots, Plots & Daring Escapes!
ISBN: 9781250874559

The 130-Story Treehouse: Laser Eyes and Annoying Flies
ISBN: 9781250874887

The 143-Story Treehouse: Camping Trip Chaos!
ISBN: 9781250874894

The 156-Story Treehouse: Holiday Havoc!
ISBN: 9781250850171

Marc Notes:
Originally published as 'The 13-storey treehouse' in Australia by Pan Macmillan Australia Pty Ltd--Title page verso.;Who wouldn't want to live in a treehouse? Especially a 13-story treehouse that has a bowling alley, a see-through swimming pool, a tank full of sharks, a library full of comics, a secret underground laboratory, a games room, self-making beds, vines you can swing on, a vegetable vaporiser and a marshmallow machine that follows you around and automatically shoots your favourite flavoured marshmallows into your mouth whenever it discerns you're hungry. Life would be perfect for Andy and Terry if it wasn't for the fact that…