George MacDonald’s Castle Warlock is many things: a mystery, an adventure, a coming-of-age story, a celebration of the beauty of the Scottish Highlands, and a revelation of spiritual truth. At the novel’s center are two unforgettable characters, young Cosmo Warlock and his father, the Laird of Glenwarlock. Michael Phillips captured the essence of this Christian classic when he wrote that “most striking of all is the love which exists between Cosmo and his aging father, in the heart of which pulsed the earliest attraction of the boy toward the heartbeat of God himself.”