Just script to download all my purchases.

fuck_you_books.ru.js

$('a.pdf').each(function(_,i) {
  var i = $('<iframe />')
    .attr('src', i.href)
    .load(function () {
      i.contents().find('[name="agreed"]').click();
      i.contents().find('[type="submit"]').click();
    })
    .appendTo('body')
  ;
});