Mattimeo

In the magnificent tradition of Watership Down, an extraordinary tale of courageous adventure--from the author of Redwall and Mossflower.

In the Summer of the Golden Plain, the cunning fox, Slagar the Cruel, and his evil henchmen sneak into Redwall Abbey to kidnap the Woodland children--including Mattimeo, son of the great warrior mouse Matthias. Now Matthias and a handful of brave followers must abandon their home to the mercy of General Ironbeak's invading ravens in order to rescue their stolen little ones. But on the road to a dread kingdom and certain slavery, an unexpected hero will be born--and the captive mousechild Mattimeo will prove himself worthy at last to wield the sword of his illustrious father.

This is #3 in A Tale From Redwall.