Death's Dark Valley

1311. Edward I is dead but at Holyrood Abbey the old king's former bodyguards protect his relics and watch over a mysterious prisoner. When Abbot Henry is poisoned and two of the brothers brutally slain Sir Hugh Corbett Keeper of the Secret Seal is summoned to Holyrood. News of the killings also attracts the attention of two unwanted guests: the sinister Marcher Lord Mortimer and King Philip of France's devious envoy De Craon. As more deaths occur Corbett must act quickly to identify the demon who has risen from hell to turn the abbey into a house of murder...