Andy Griffiths and Terry Denton are taking over Sydney Town Hall to launch the latest instalment of The 91-Storey Treehouse! The seventh book in the series adds 13 new levels to the amazing treehouse, including the world's most powerful whirlpool, a mashed-potato-and-gravy train and a human pinball machine.

They'll tell you all about how they get their madcap ideas, like going for a spin in the world's most powerful whirlpool, taking a ride in a submarine sandwich, getting marooned on a desert island, hanging out in a giant spider web, visiting the fortune teller's tent to get your fortune told by Madame Know-it-all and deciding whether or not to push the mysterious big red button!

Well, what are you waiting for? Come and join Andy and Terry for a wacky adventure at the Sydney Town Hall!

Pre-order your copy of The 91-Storey Treehouse here. 

Andy Griffiths (Australian)

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Andy Griffiths is the most popular children's author in Australia. He has written more than 25 books, including nonsense verse, short stories, comic novels and plays. His books have been New York Times bestsellers, won more than 50 children's choice awards, been adapted as a television cartoon series and sold more than five million copies worldwide. He is best known as the author of the JUST! series, The Day My Bum Went Psycho and the bestselling Treehouse series.

Terry Denton (Australian)

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Terry Denton is a writer and illustrator based in Melbourne, Australia. His work is mainly humour-based cartoon style. Terry has illustrated bestsellers such as the JUST! series and the Treehouse series by Andy Griffiths. He has three children and is the owner of a back garden burial ground for dead pets.