Books in the Hourglass series

The icy land of Screenia is plunged into disarray when its ruler is assassinated by a powerful unknown entity. Korin, the unwilling new king, wrestles with his own fears and desires, finding himself maneuvered into leading the kingdom into a counterattack he doesn’t support.Only Calthus, an aging court advisor and sorcerer, knows the true danger facing Screenia’s invasion force, that an ancient evil, the Bo’Rai, is stirring again.Beset by mysterious attackers, the depleted army advances. Calthus grows more powerful but, with each step, the soul-destroying sins of his past come back to haunt him. Are his crimes too great for atonement? Can he prevent the Screenians from marching towards their doom?