The Ivory Tower is the third Bob the Caretaker novel — a taut, escalating thriller about a man with a new name, a new badge, and a fresh alias, slipping unnoticed into the halls of power. Now calling himself Daniel Mercer, Bob moves through Briarwood University as he always has: quietly, precisely, seeing what institutions hope no one sees. And when the first name goes into the basket, the tower learns what every building before it has learned — Bob doesn't clean messes. He removes them.