Blood of the Warlord — Griff Hosker

Book 12 in the Border Knight series. The warlord, his son and even his grandchildren are all dead. Sacrificed by kings who used them. Now King Henry asks the great-grandsons of the Warlord to help his son, The Lord Edward, learn how to rule. Sent with too few men and too many enemies, Sir Henry Samuel, Sir Alfred and the newly knighted Sir Thomas must learn how to use their skills, not in the familiar borderlands but in Gascony where insurrection and treason have reared their heads.