Too many great works are forgotten by new generations. Your book was collecting dust until Moore, who clearly admires you, payed homage to your book with the title of his documentary. Legally, he doesn't need your permission to do that. Apparently, someone has been feeding you bad legal advice on this subject.

The movie will already help your book sales indirectly, whether or not you get any money from Moore. Why be so grumpy to a artist that's on your side ideologically and who helps you sell your book and reminds a new generation that's never heard of you that you existed? This is a win/win relationship.