Restrict PDF Access

Hi there,

I’ve been using this plugin for almost a year now for our magazine subscription product and we’re loving it! HOwever, one issue we’ve experienced lately and that is the PDFs are accessible via the media library folder of WordPress. As we have a subscription based product, we would like our subscribers to only be able to view our PDF magazines via the 3d flipbook plugin access. However my question is whenever we try to restrict access to media library, subscribers then lose access to the magazines as 3d flipbook uses URLs from media library. Is there any way we can source PDFs so that even if we restrict access to media library, our subscribers will still be able to view the PDFs via 3d flip book?

Thanks very much and I’d be really grateful for a response.