|summary=Kester has saved the animals, but his task is not yet over – not by a long way. There are other animals deep underground who plan to destroy the human world and return it to nature. Our hero will need all his strength and courage if he is to find a way to stop them before it's too late.
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'''Winner: Guardian Children's Fiction Award 2014'''
Be careful when reading this book: it presents humanity and its tendency to destroy everything in its path so convincingly that you may end up siding with the bad guys! Kester's world is a dystopian mess, and the fact that this time the threat comes from a quite unexpected quarter only makes things harder for him.
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