The Death of Dulgath

When the last member of the oldest noble family in Avryn is targeted for assassination, Riyria is hired to foil the plot. Three years have passed since the war-weary mercenary Hadrian and the cynical ex-assassin Royce joined forces to start life as rogues-for-hire. Things have gone well enough until they're asked to help prevent a murder. Now they must venture into an ancient corner of the world to save a mysterious woman who knows more about Royce than is safe and cares less about herself than is sane.