Zack would be better off trying to find a publisher in order to get his book out as quickly as possible than getting into a costly and protracted legal battle that, let's face it, he is not likely to win. Getting Jawbreakers into the hands of his audience would be the real victory here.
And not for nothing, but he could stop being such a whiner, too. Why is it so many professional "trolls" go around looking for a fight, then start crying when they get one? Enjoy the free publicity, get your product out, hopefully establish a comic buying following so you can do it again. Stay focused.