The Lord Owl's dark power is spreading through the land of Riverbourne... The Lord Owl has an evil plan -- seize the emerald throne of the legendary eagle kings and name himself the king of Riverbourne. After stealing the silver horn from its hiding place in Watersmeet, he swoops through the night toward Eaglesmount. Vair and his companions, the red squirrel Shadow, the vixen Kyria, and the fierce wildcat Flora, race to get to Eaglesmount first. But as they climb above the lake to the now silent court of the eagles, they cannot guess what waits for them when they reach the emerald throne... Book jacket.