Your father is a pharaoh (actually he wanted to be a seagull, but that’s not the point). And you are the son of a pharaoh, sent to study in the famous Ankh-Morpork. But what profession would fit the future ruler best? The one that involves delicate work with people, constant resolution of complex issues, and eliminating unnecessary problems. In other words: a contract killer.
The flattest world in all the multiverse returns in all its splendor (including: elephants—four of them, the Great A’Tuin, the universal turtle—one piece, and the crazy inhabitants of the Disc—their numbers keep growing).