Chloe Daykin Knihy

. So when new boy and nature fan Patrick Green starts at school with 'fingers like steel, strength of a bear' and a mackerel swims up to Billy's face, blows bubbles into his Vista Clear mask goggles and says: 'Fish Boy', Billy knows he can't keep it secret, because .

But now, on his twelfth 'discovery day', it's time for Elvis to find out who left him at the zoo, and why?On an epic adventure that takes Elvis to an island off the coast of Norway, he will finally discover the truth about his past...