The Pearls of Lutra by Brian Jacques

In the magical world of Redwall Abbey, the hogmaid, Tansy, has found the first clue to the seven most beautiful pearls, The Tears of the Oceans. While she, Rollo the Recorder, Craklyn the squirrelmaid, and the mousemaid strive to find the seven pearls so secretly hidden away by Fermal and with riddles as their only clues, Martin the Abbey Warrior and a band of heroic creatures are out on a quest to bring back the Abbot of Redall Abbey. For Ublaz, the pine marten emperor, also wants to get his hands on the pearls. With all this, you've got yourself a most fabulous tale of friendship, laughter, tears. E.Y.