The Sword and the Flame (The Dragon King Saga book 3) by Stephen Lawhead

Many Years of peace have passed under Quentin rule as the Priest king he is married to Bria they have tree children and Quentin is trying to raise a great Cathedral to the most high. But the peace is about to end and Nimrood has returned and kidnaps Quentin son. Quentin quenches the light of Zhaligkeer in his anger over his sons kidnap. Now he must rescue his son, Stop Nimrood and regain the favour of the most high. This is my least favourite of the trilogy as Quentin comes off a bit whiney. But it is still a very good and entertaining book.