When John Gordon first heard the voice inside his mind, he thought that he was going crazy. It came first at night when he was just falling asleep. Through his drowsing thoughts, it spoke sharp and clear. "Can you hear me, John Gordon? Can you hear me call?" Gordon sat up, suddenly wide awake and a little startled. There had been something strange and upsetting about it. Then he shrugged. The brain played strange tricks when a man was half-asleep and the will relaxed. It couldn't mean anything. He forgot it until the next night. Then, just as he began to slip into the realm of sleep, that clear mental voice came again. "Can you hear me? If you can hear me, try to answer my call!