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اسم المؤلف    Andy Griffiths

Andy and Terry's amazing treehouse has thirteen new levels (it used to be 13 storeys, then 26, but they keep expanding!)

They've added a chocolate waterfall you can swim in, a volcano for toasting marshmallows, a bulldozer-battling level, a baby-dinosaur-petting zoo, a not-very-merry merry-go-round, a boxing elephant called the Trunkinator, an X-ray room, a disco with light-up dance floor, the world's scariest roller coaster and a top-secret thirty-ninth level which hasn't even been finished yet!