In Sylvan Shadows

Enter the Forest of Shadows...
In Sylvan Shadows follows Cadderly the scholar-priest, as he leaves his home to combat the evil unleashed by the Chaos Curse. To counter Castle Trinity's plans for conquest, the cleric and his friends enter the beautiful forest of Shilmista. But among the trees and glades of the forest, Cadderly must battle a monstrous evil.
From the Paperback edition.
The second novel in the Cleric Quintet, a five-book series focusing on the adventures of an eccentric young scholar-priest named Cadderly. Cadderly must save the inhabitants of the beautiful elven forest, but not even his powerful companions can insulate Cadderly from the trials he must face.