The 13-Storey Treehouse 9780552552110 The twins' investigations through the

The twins' investigations through the school in the dead of night reveal a secret hidden deep within the walls

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a lifetime later

As soon as they heard the name DuPont - the area's largest employer - he felt they were reluctant to investigate further

The 13-Storey Treehouse 9780552552110 The twins' investigations through theThe 13 Storey Treehouse is the first book in Andy Griffiths and Terry Denton's Wacky Treehouse Adventures, where the laugh out loud story is told through a combination of text and fantastic cartoon style illustrations. Andy and Terry live in the WORLD'S BEST 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 into your mouth