Royal Assassin is the second book in the Farseer trilogy by Robin Hobb.
Fitz came out of his first dangerous mission as an assassin, but is forever changed by the experience. Not just in health, but also in realisation of the danger that his uncle Regal truly presents. Yet he is stuck at Buckkeep with the man, and his promise to his king compels him to not retaliate. He is pulled back into the intrigues of the court, and trying to protect those he cares about. The kingdom is under attack from insidious forces from within. And the Red Raiders will soon come back to their shores.