This page is originally made for those who need to download the pages from ISSUU, the site has, however, been attacked by some guys for several times, which forced it to set down.
Hence, the previous function of downloading the images as a .ZIP file is temporarily removed, and you have to download the pages through the links exported instead. If you really need to download the books directly inside the page, feel free to contact me, and I will show you how to make it.
Anyway, it is not difficult now, you can copy and paste the outcome links into any download software, such as Xunlei, and then start a batch task. It only takes seconds to get all images with the highest resolution. Enjoy!