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