A mysterious coin leads two strangers on a daring journey to an uncharted island. I am being followed... That was the cryptic note that accompanied the ancient coin Zachary Selmon examined in his campus office. An archeology professor by day and a numismatist, or collector of coins by night, Zach was puzzled by this piece of silver and concerned about the old friend who sent it. Art grad student, Gretchen Rice, was...