Books with title Allies and Assassins: Number 1 in series

They killed his brother. Now they're coming for him. . .As the second prince of Archenfield, Jared never asked to be more than the spare. But behind the walls of the castle is a dark and dangerous court where murder and intrigue are never far below the surface. Now his older brother is dead. The kingdom is his. And the target is on his back. Can he find the assassin before the assassin finds him?