Eugene Schwartz did not write a "hack" book. He wrote a philosophy book. He argues that advertising is not a battle of products; it is a battle of perceptions . The winner is not the one with the best widget, but the one who best understands the current state of the prospect's mind.
And more importantly, if you manage to find a , what exactly are you looking for? breakthrough+advertising+by+eugene+schwartz+pdf
His core thesis is this: