The hilarious children's book from No. 1 bestselling author David Walliams - a fantastically funny tale illustrated by artistic genius Tony Ross.WELCOME TO THE ISLE OF MULCH...This little island is home to a large number of HORRIBLE grown-ups who like nothing more than making children miserable. The most AWFUL one of all is Aunt Greta Greed who owns the whole island.Something needs to be done about them. But who could be brave enough?Meet Ned - an extraordinary boy with a special power. SLIMEPOWER!