The most useful advice ever given, 'Don't panic', can be found within the Hitch-Hiker's Guide to the Galaxy. The day aliens decide to demolish the Earth to make way for a hyperspace bypass is the day when Arthur Dent realises the futility of such advice. The story begins when Arthur, not really your average man-in-the-street, finds that his planet is suddenly destroyed around him, and the great hitch-hike begins...
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.