Part Two of the Tregarden Trilogy, a haunting Ghost Story … The year is 1975 … Two years since the dramatic events in ‘The Librarian’ and antiquarian Jack Tregarden finds himself facing the second of Sir Simon de Betancourt’s deadly puzzles. The sudden death of a fellow academic and the strange bequest of a mysterious drawing lead inexorably to a remote corner of England and the source of an ancient evil … The Hexagon