La Voix du Loup, tome 2 : The Fox's TowerSam Thompson

When Willow witnesses her animal-loving father, Silas, get kidnapped by a group of foxes and a huge wolf-like creature, she pursues them into the woods. There she meets wolves who tell her they know her father. Together they boldly enter the enormous tower the foxes have built deep in the forest. In the tower Willow discovers the dark project of the chief fox, Reynard, to create new life forms from magical clay buried in the Deep Forest where few can enter. To rescue her dad, Willow must brave the Deep Forest and dig deep in herself to foil Reynard's evil scheme to remake the world – but she also finds herself siding with the foxes against their new oppressor, the charismatic but wicked lion Noble.