Mystery of Shark Island

Marooned on a remote outpost in the Greek archipelago, BJ, Graham, Paul and Terry think they are safe from the criminal syndicate they helped to expose in their previous adventure. It is not long, however, before a chance find of a thumb drive throws them into another mystery, and triggers a chain of events that puts their lives in mortal danger.Who is the ever-present Cigarette-Smoking-Man, what ...