Sergeant Amy Callan and Lieutenant Caroline Cooke have a lot in Both were army Both were acquainted with Jack Both were forced to resign from the Now they're both dead, found in their own homes, naked, in a bath full of They are apparent victims of an army man - a loner, a smart guy with a score to settle, a ruthless vigilante, and a man just like Jack. The Author of this Book is Lee Child . Array ISBN . . The Visitor: A Thriller available in English.