Welcome to Andy and Terry's treehouse! But it’s not a typical treehouse – it’s the world's most exciting tree house with 13 floors, a bowling alley, a see-through swimming pool, a secret underground laboratory and a marshmallow machine that shoots goodies into your mouth whenever you're hungry. The 13-storey treehouse has taken Norwegian readers by storm, becoming one of Norway's most read series. Here, the strange concoctions and humour are combined in a universe where anything can happen. Meet author Andy Griffiths who is joining digitally (but live!) from Australia in an event led by Simon Stranger.

Wednesday 24. May



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