issuu-dl downloads documents from issuu.com. It downloads the document's pages in the jpg format and saves those in /tmp to some temporary directory. The images are not deleted. The images are then converted to a pdf and it will be saved in the current directory and named by the title of the document.
./issuu-dl <url of the magazine/book on issuu.com>
The URL needs to be for the whole document, for example https://issuu.com/jmadler/docs/modern_perl, not anything else, like not a URL for a single page.
You might need to change a couple of ImageMagick policies. The file is /etc/ImageMagick-6/policy.xml in Linux.
Uncomment this one or set to rights="read|write".
<policy domain="coder" rights="none" pattern="PDF" />
Set disk cache usage higher, I set it to 8GiB here.
<policy domain="resource" name="disk" value="8GiB"/>
wget, ImageMagick (convert).