Crown and Covenant series 
Duncan's War, book 1: Young Duncan M'Kethe finds himself caught in the web of Sir James Turner, the former Covenanter turned military leader of the persecutors. Duncan is torn by his hatred of the English, who have treated his friends cruelly, and his father's instructions to love his enemies. He must be true to Jesus Christ while attempting to rescue his father from enemy hands.
King's Arrow, book 2: Agnus M'Kethe, a ready archer, guards sheep from scavenging crows. Loyal to his family, Agnus must match wits in a life-and death struggle against Highlanders. By faith, Agnus turns his beloved game of chess into a tool of victory. But desperate fear grips the Clan with an unexpected murder! Will Covenanters be found guilty? Angus's true test of manhood and marksmanship will come at the Battle of Drumclog.
Rebel's Keep, book 3: Brothers Duncan and Angus team up again to stand for the Covenanter's cause and fight the king's injustice. Will they be forced to flee to America, leaving behind their beloved homeland? Or will they save the home and land they love?