The Devil's Armor is the second novel in the Lukien series, following The Eyes of God. In the previous volume, Trager has killed Kahan Kadar of Jador. Later, when King Akeela seems about to free the captured Lukien, Trager also killed Akeela and blamed Lukien. Then Trager led his army of 1200 men against Grimhold, where Lukien baited him into fighting a duel to the death. After Lukien won, the Liirian army is allowed to leave Grimhold and Jador. Lukien was saved from dying of his wounds by one of the Eyes of God and stayed in Grimhold as its protector.