The Colour of Magic Twoflower was a tourist, the first ever seen on the Discworld. Tourist, Rincewind decided, meant idiot. Somewhere on the frontier between thought and reality exists the Discworld, a parallel time and place which might sound and smell very much like our own, but which looks ... completely different. It plays by different rules. Certainly it refuses to succumb to...
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.