Simon Thorn and the shark's cave

12-year-old Simon Thorn's life is almost unrecognisable from just a few months ago.

He has a twin brother, an uncle he never knew and his first real friends at the secret Animalgam Academy.

Not only is he an Animalgam, he's also the Beast King - heir along with his brother to a bloodline more powerful and dangerous than any other.

In this final instalment in the action-packed trilogy, Simon must venture into the water kingdom.

But danger lurks in the shadows beneath the waves and Simon will have to call upon his friends and all he's learnt to survive - and save the world.