Humble bundle book bundles - download all books at once

hb_all_books_dl.js

/* 
After purchasing a humble book bundle, go to your download page for that bundle. 
Open a console window for the page and paste in the below javascript.
This will download all the books in all the formats available.
*/ 
$('a').each(function(i){
   if (['MOBI', 'PDF', 'EPUB'].indexOf($.trim($(this).text())) >= 0) {
      $('body').append('<iframe id="dl_iframe_'+i+'" style="display:none;">');
      document.getElementById('dl_iframe_'+i).src = $(this).data('web');
   }
});

This works really well, but it doesn't seem to work with PDF's. I've tested in Chrome on both MacOS and Windows.

I tried adding;
if (['MOBI', 'PDF', 'EPUB', 'PDF (HQ)'].indexOf($.trim($(this).text())) >= 0) {
But that didn't seem to make a difference.

I guess the issues with PDF is that many browsers try to open them instead of offering the download dialog ...

For the PDF issue nvilagos provided solution that works for me.

The location of the plugins have changed, you can set the required field here:
Settings (chrome://settings) --> Advanced --> Privacy and security --> Content settings --> PDF documents --> Download PDF files instead of automatically opening them in Chrome --> Turn ON

My version:

var s = "";
$('.js-start-download a').each(function() {
    s += $(this).attr("href") + "\n";
});
console.log(s);

This doesn't work anymore _

As @deadphan says, it doesn't seem to work anymore.

So I used the JS-Code from @inicola to get all Links and downloaded using PowerShell:

$links = 'link1',
'lin2',
...

foreach($link in $links){
    $name =  $link.Split("?")[0].Split('/')[3]
    $path = ".\ebooksHumbleBundle\" + $name
    wget -Uri $link -OutFile $path


}

Or simply copy/paste the links from the console log to "list.txt" and use "wget -i files.txt" ...