The battle for your mind has already begun.   At Jodrell Band in England Observatory in England, a radio telescope has detected a mysterious signal of extraterrestrial origin—a message that may be the first communication from an interstellar civilization. Has humanity made first contact? Is the signal itself a form of alien life? Could it be a threat? If so, how will the people of Earth respond?             Jack Fenwick, artificial intelligence expert, believes that he and hi