Mattimeo is a fantasy novel by Brian Jacques, published in 1989. It is the third book in the Redwall series. It is also one of the three Redwall novels to be made into a TV series.
Mattimeo is a direct sequel to Redwall and Mossflower, taking place eight seasons (two years) after the events of the first novel. The peaceful woodland creatures of Redwall Abbey are busy preparing for a feast during the summer equinox. Matthias and Cornflower have had a son named Mattimeo, who has been generally spoiled throughout his life by the inhabitants of Redwall. Meanwhile, the masked fox Slagar the Cruel and his gang of slavers are planning to enter Redwall Abbey during one of their feasts. Slagar, a villainous fox craving revenge for a crime never committed against him, intends to capture slaves from Redwall and take them to an underground kingdom ruled by a mysterious, god-like figure named Malkariss to be sold as slaves.
After drugging the Abbey residents, he kidnaps Mattimeo, Tim and Tess Churchmouse, Cynthia Bankvole, and Sam Squirrel. They meet Auma, (a young badger maid) and Jube, (a hedgehog), who were also kidnapped by Slagar the Cruel. Upon discovering the children missing, Matthias, Basil Stag Hare and Jess Squirrel with the help of a few friends, leave the Abbey to hunt down Slagar and return the children back home. They encounter Cheek, an ottercub Matthias describes as “Cheek both by name and by nature”.
On their journey, they meet up with Orlando the Axe, the father of Auma, and Jabez Stump, the father of Jube. As they journey, they find the Guerrilla Union of Shrews in Mossflower (Guosim), and convince them to aid the travellers on their quest.