The Outcast of Redwall : Redwall Series (1997 Paperback)

Many seasons ago, the evil ferret warlord known as Swartt Sixclaw abandoned his infant son and left him for dead.... Raised among the good creatures of Redwall Abbey,the ferret Veil could never escape his fathers tainted blood. And when he committed an unforgivable crime, Veil was banished from abbey forever..... Now sixclaw and his vicious though raised by the good creatures of Redwall Abbey, the young ferret Veil was cast father is leading hordes of sea rats and vermin on the warpath, and Veil must choose his destiny- as a friend or foe of Redwall Abbey...