Laugh-out-loud adventures in the wackiest treehouse EVER! The first in a highly illustrated series for fans of Diary of a Wimpy Kid and Barry Loser.

Winner of Sainsbury's Children's Book Awards: Fiction for Age 5-9 Years 2015.

Longtime collaborators Griffiths and Denton (Killer Koalas from Outer Space) get metafictional in their latest book (first published in Australia), and the result is anarchic absurdity at its best... Denton's manic cartooning captures every twist and turn in hilarious detail, as babies are pelted with garbage, yapping dogs squashed, and monkeys catapulted into the distance. A sequel was published last year in Australia and can't arrive soon enough. -- Publishers Weekly Publishers Weekly With its slapstick humour, brilliant absurdities and some bonus puzzles to solve at the back of the book, The 13-Storey Treehouse is the best 'tall story' you'll read this year! Lancashire Evening Post Longtime collaborators Griffiths and Denton (Killer Koalas from Outer Space) get metafictional in their latest book (first published in Australia), and the result is anarchic absurdity at its best... Denton's manic cartooning captures every twist and turn in hilarious detail, as babies are pelted with garbage, yapping dogs squashed, and monkeys catapulted into the distance. A sequel was published last year in Australia and can't arrive soon enough. -- Publishers Weekly Publishers Weekly Full of crazy, funny pictures, which will make you laugh ... Extremely enjoyable, very funny and easy to read! -- SophieStarlight Guardian.com Especially good for reluctant readers as it is heavily illustrated and VERY funny ... This really is the coolest treehouse ever! Angels & Urchins Packed with cartoons and craziness Sunday Express

Andy Griffiths is Terry's best mate. He is also Australia's number one children's author! His books, including his 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. The fourth Treehouse book, The 52-Storey Treehouse, won the Australian Book Industry Awards Book of the Year prize, the first children's book to ever do so. 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. Terry Denton is Andy's best mate. He is also a bestselling and award-winning writer and illustrator based in Melbourne, Australia. Among other things, he worked on the Horrible Science series for Scholastic UK. He lives by the beach with his wife and three kids.