In the year 2025 the Internet practically runs the world, and its virtual reality webwork has to be policed by Net Force to prevent computer-terrorists from sabotaging it. But sometimes they need help. Which is where the Net Force Explorers come in, the young people's auxiliary for computer whiz-kids who have made it through a tough training programme. Now secrets are being posted on the Web - ranging from innocuous to deadly - and no one can figure out who is doing it or why. But Explorer David Gray begins to suspect that his employers - a firm that manufactures a computer you can wear th...