Assassin's Fate is the third book in the epic fantasy trilogy Fitz and the Fool, written by American author Robin Hobb.

It continues the story of FitzChivalry Farseer and his daughter Bee after the events of Fool's Quest, published in 2015.

However, Bee manages to slip them a cryptic message that "The way out is a way in," by which Fitz realizes that she is telling them to try entering the castle through its sewage tunnel.

The team makes the disgusting trip through the tunnel and emerge into bowels of the castle, where they find and release the Fool.

She slips into the huge castle library and begins dumping oil lamps one after another onto the floor, where she has thrown many of the books and scrolls.

When she sets flame to the oil, the entire library quickly erupts, and she tries to find a way to escape the smoke.

After they leave, a vial of Silver explodes and coats much of Fitz, healing his immediate wounds and giving him a means of cutting the debris trapping him.