The Lyre Birds (English, Paperback, Stewart E.J.)

The Kingdom of Larkwood has just recovered from its own civil war when a terrible flood destroys the castle. Then the creatures learn that someone has kidnapped the Crimson Cardinal. Hordes of sloths threaten to invade the Cardinal Kingdom. A family of mice who live in the castle are upset when the father of the family goes to war. The mother must raise two teenage children on her own.