Mattimeo by Brian Jacques
Slager the fox is intent on revenge. . . . . On bringing death and destruction to the inhabitants of Redwall Abbey, in particular, to the fearless mouse-warrior, Matthias. But how can Slager overcome the power of the legendary Redwall sword? Gathering his evil band around him, Slager plots to strike at the heart of the Abbey. His cunning and cowardly plan is to steal the Redwall children - and Mattimeo, Matthias's son, is to be the biggest prize of all. The third, dramatic volume in the bestselling Redwall trilogy.