Plugin for Zotero for direct download of PDFs

Hello! I would like to have a library genesis plug for Zotero that would automatically download pdfs based on the ISBN number. There is already a plug-in on Github which downloads articles from SciHub based on the DOI number. So, I would like it either to have one of the following options: 1) either a modification of the same plugin with an additional feature to download the books from LibGen as well, or 2) to have a separate plugin that would download books based on their ISBN number from LibGen libraries.

Link to the scihub plugin on GitHub: Link to SciHub plug in: https://github.com/ethanwillis/zotero-scihub

Please check the code first and apply only if you are familiar with the whole procedure. Explain what is the process that you plan to do. Thank you.