Book excerpt: In this captivating climax to the award-winning Harwood Mysteries series, Xan must unravel his most perilous mystery yet. Xan, Christina, and Lucy undertake a dangerous voyage across treacherous seas so that Xan can confront Moorish pirates who are holding Uncle William for ransom. When the friends encounter a sinister evil force, their faith and friendship is put to the ultimate test. Set at the dawn of the Third Crusade, their adventure is brimming with peril and intrigue. Will a malevolent figure from their past thwart their mission? Are demonic forces at work outside the city walls? Will Xan and his friends fall prey to the dark forces that threaten to consume them?