An ancient battle. A dead researcher. And a very modern crime. It's been more than a year since Detective Sergeant Fiona Griffiths had any sort of murder case . . . when all of a sudden, she gets the call. A local archaeologist has been found bloodily murdered. Her head severed from her body. Her eyes apparently fixed on a fragment of Latin text.The crime seems to summon the ghosts of Dark Age Britain - and the shade of King Arthur.But why are those...