Inspired by an actual terrorist attack on Greenwich Laboratory in 1894 'The Secret Agent' is arguably Conrad's greatest work. Mr. Verloc, the spy, is roused to action by his masters. He is to instigate an act 'of destructive ferocity so absurd as to be incomprehensible, inexplicable, almost unthinkable; in fact, mad'.
The first message sent to Tom Thorne's phone was just a picture - the blurred image of a man's face, but Thorne had seen enough dead bodies to know that the man was no longer alive. But who was he? Who sent the photograph? And why? While the technical experts attempt to trace the sender, Thorne searches the bulletins for a reported death that matches the photograph. Then another picture arrives.