I've found this that may help you guys....
Good luck
How to Convert ZNO to PDF
1. Get Adobe Acrobat Professional (Not Reader).
2. Make sure the Adobe PDF printer is NOT the default printer. This is imperative to the ripping process.
3. Starting with the first page (cover), hit Ctrl+P in Zinio.
4. Select Adobe PDF from the printer drop-down menu.
5. Print the page and save in some sequential order, for example 001.pdf
6. Repeat for each page (excluding advertisement pages) of the magazine.
7. Open Adobe Acrobat.
8. Go to File --> Create PDF --> From Multiple Files…
9. Click Browse, go to directory where you saved the printed PDFs.
10. Select all the files (click on the first one, hold down shift and click on the last one)
11. Make sure files are arranged in order
12. Create PDF