Andy Griffiths is Terry's best mate. He is also Australia's number-one children's author. His books, including the popular Treehouse series, have been hugely successful internationally, winning awards and becoming bestsellers in the UK and the USA as well as in his homeland, Australia. Andy thrives on having an audience: he has worked as a high-school teacher, been the lead singer in a rock band and a stand-up comedian. He is a passionate advocate for literacy, has two daughters and lives in Melbourne, Australia.

143 Storey Treehouse: Andy and Terry live in a 143-story treehouse. (It used to be a 130-story treehouse, but they built another 13 stories.) It has a baked bean geyser that erupts on the hour every hour, a wrecking ball, a fish milkshake shack, a word-o-matic (it knows every word in the whole world!), a toffee apple orchard guarded by a kind-hearted scarecrow, and a camping ground.

Andy's been a bit stressed out lately, so Terry decides the perfect way to relax would be to head up to their new camping ground level for a much-needed vacation. But it turns out to be not quite as relaxing as planned. Terry forgets to pack the tent and the food, their attempt at fishing ends in disaster, the spooky campfire stories are a little too spooky and then, to make matters worse, all of Andy’s fellow campers start mysteriously disappearing. Can Andy brave the dark, dark woods and rescue them in time to finish writing their next book?

130 Storey Treehouse: We've added 13 new levels to our treehouse, including a soap-bubble blaster, a grabinator (it can grab anything from anywhere at any time), a time-wasting level, a toilet-paper factory (because you can never have too much toilet paper) and an extra-terrestrial observation centre...which will come in handy when giant flying eyeballs from outer space come to grabinate us!

117 Storey Treehouse: They've got a tiny-horse level, a pyjama-party room, an Underpants Museum and Treehouse Information Centre! 

104 Storey Treehouse: They've added thirteen new levels, including a never-ending staircase, a burp bank, and even a mighty fortress. 

91 Storey Treehouse: They've added thirteen new levels, including the world's most powerful whirlpool, a mashed-potato-and-gravy train and a human pinball machine. 

78 Storey Treehouse: They've added 13 new levels including a drive-thru car wash, a combining machine, a scribbletorium, an ALL-BALL sports stadium. 

65 Storey Treehouse: It has a pet-grooming salon,a birthday room where it's always your birthday. 

52 Storey Treehouse: Andy and Terry's incredible, ever-expanding treehouse has thirteen new storeys, including a watermelon-smashing level. 

39 Storey Treehouse: They've added a chocolate waterfall you can swim in, a volcano for toasting marshmallows, a bulldozer-battling level, a baby-dinosaur-petting zoo. 

26 Storey Treehouse: There are now thirteen brand-new storeys, including a dodgem-car rink, a skate ramp, a mud-fighting arena, an antigravity chamber. 

13 Storey Treehouse: It's got a giant catapult, a secret underground laboratory, a tank of man-eating sharks and a marshmallow machine that follows you around and shoots marshmallows.