From the winner of The Guardian Children’s Fiction Prize comes the final heart-stopping installment of the Dark Wild Trilogy.

This 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 ocean.

2. A mysterious steel dome has risen from the Four Towers.

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