The Secret of Firefern

Why has a haunted manor deep in the forest of Anjou been bought by the popular Baron Felix of Firefern? Why does a mysterious light burn in its turret when no one is there? How did its previous occupant, the mysterious Doctor Wolfram, meet his death, and why will his body not rest quiet?
Witchcraft and Satanism are never far away in this story of the fifteenth century. After Good King René's brush with death, Baron Firefern is accused of poisoning and sorcery. The ensuing trial, with its astonishing dénouement, is one of the great court scenes of literature.
The revelation of the Secret of Firefern solves the mystery but imposes a mission. Firefern's envy-driven cousin Lord Walter de Maulny cannot be allowed to succeed in his damnable enterprise. But who can stop him? Will Galahad de Kernis, the plucky Breton page, or returning crusader Sir Tancred de Villepreux, prove the ultimate hero in the final battle ... or will Firefern himself have the last word?