Two original questions...

I watched this show again recently for the first time in years. Two things I'm puzzled on, when the shadow man killed Casey's agent Jessica at the airport, what did the killer mean when he said "for that's her greatest fear, I know it is Casey, I read it in your thoughts"? What exactly was Jessica's fear? That of death, or dying at the hands of the shadow man? Or did it mean something else altogether? And when Casey and Jack went to the site of the mall killing, it was revealed that Jack had infact read one or all three of Casey's books. So what could this have meant, that none of the books had Casey's picture in them? Because if he had read the books, how could he have not known who Casey was when they first met? And if he somehow did know who she was, was he just playing stupid with her from the start?