FROM THE WINNER OF THE GUARDIAN CHILDREN'S FICTION PRIZE A thrilling animal adventure for fans of Roald Dahl, David Walliams and Katherine RundellThis is the story of a boy named Kester.

He has rescued the last wild animals in the world, and saved his capital city from destruction.

But now he must face his greatest challenge yet, because:1.

The only blue whale on the planet has brought news from across the ocean2.

A mysterious steel dome has risen from the Four Towers3.

Out there, somewhere, a brave mouse holds the key to the future...