Redwall: The Graphic Novel was published in 2007 for the US only by Philomel as a comic book adaptation of the first book in the saga, Redwall. Illustrations are in black and white.
It was released alongside Eulalia! and the Redwall 20th Anniversary Edition.
The official summary is as follows:
When the peaceful life in and around ancient Redwall Abbey is shattered by the arrival of the evil rat Cluny and his villainous hordes, Matthias, a young mouse, determined to find the legendary sword of Martin the Warrior which, he is convinced, will help Redwall's inhabitants destroy their enemy.