Redwall by Brian Jacques - the book that started the series. When the peaceful life of ancient Redwall Abbey is shattered by the arrival of the evil rat Cluny and his villainous hordes, Matthias, a young mouse, determines to find the legendary sword of Martin the Warrior which, he is convinced, will help Redwall's inhabitants destroy the enemy. I've been recommending this series for years and never read it. So I got it on CD and really enjoyed the story. It is definitely good vs. evil. Looking forward to reading more in the series.