The Demon Apostle (Corona: The DemonWars Saga, #3)

This is the third installment of Salvatore's Demon trilogy that starts with The Demon Awakens and The Demon Spirit. Once again the demon dactyl of Corona seems defeated. Ranger Elbryan Wyndon goes north to protect the new settlers from goblins and powries, but his beloved Jilseponie returns to Palmaris. There Father Abbot Markwart is consolidating his power over Church and State with the aid of gemstone magic and the demon's power. Pony's determination to stop the evil abbots puts her and Elbryan in deadly peril, for even the king has been turned against them.