Silvercloak

The world's most deadly assassin has been hired to kill King Ambrose. Once again King's Daggers are plunged into danger, because only White Sister Emerald can identify the killer's magic and only Sir Stalwart knows what he looks like. The two must trap the killer before he can strike the king -- or at them. As the trial of death leads back to Ironhall, the swordsmen school Stalwart so recently left, he finds he is a boy sent to do a man's job -- and Emerald is a girl sent to do a boy's.