Realm of Darkness: Paul Doherty

Spring, 1312. Edward II of England is absorbed with his favourite, Peter Gaveston, while his young wife, Isabella, is with child. Isabella's father, the ruthless Philip of France, dreams of a grandson wearing the Crown of the Confessor and starts to meddle - even if that means murder...
Amaury de Craon, Philip's Master of Secrets, is despatched to carry out his deadly deeds and Edward II summons Sir Hugh Corbett, Keeper of the Secret Seal, to intercept. Both master spies lodge at the Benedictine abbey of St Michael's in the forest of Ashdown. Supposedly a house of prayer, the abbey holds sinister secrets and treasures which include the world's most exquisite diamond, The Glory of Heaven. However, shortly after their arrival, the diamond is stolen and its guardian murdered. Other macabre incidents follow, Satan is seen walking through God's Acre and a nearby tavern is burnt to the ground and no one escapes. Corbett, assisted by his henchmen, prepares to navigate this hazardous maze of murder...