Arthus Trivium 4. The Invisible Army

Book Four finds our hero, Arthus Trivium, trapped with Cesar, his Master Nostradamus' son, in a burning church presided over by Melusine, a witch with a serpent's tail. She's out to bring justice and wreak vengeance on a village torn by the rape and murder of several young women. But she isn't the only villain with a noble cause. In an eldritch realm that Angelica and Angulus have visited by means of a sleeping draught, Arthus' fellow disciples face a powerful sorceress planning no less than to wipe out all men. And over the centuries, unseen, she's built up quite an army...