This looks like a self-publishing venture to me, based on the
coverage of the book you're referring to (which looks interesting!) and the lack of any other internet presence for the publisher, which also doesn't appear in print references. (There is a
commercial printer in Buffalo, New York named "Parkside Press" but there seems to be no connection.)
Given that there's no website, no listings in any professional references, and no submission guidelines for this publisher, I can't imagine how you would even approach them if you wanted to.