The 39-Storey Treehouse (Paperback) by Andy Griffiths and Illustrated by Terry Denton.
Join Andy and Terry in their astonishing 39-storey treehouse! Jump on the world's highest trampoline, toast marshmallows in an active volcano, swim in the chocolate waterfall, pat baby dinosaurs, go head-to-trunk with the Trunkinator, break out your best moves on the dance floor, fly in a jet-propelled swivel chair, ride a terrifying rollercoaster and meet Professor Stupido, the world's greatest UN-inventor. Well what are you waiting for? Come on Up! (352 pages).