For those interested in the Paperback Library series, here are some links.
The Dark Shadows Book of Vampires and Werewolves, and Jonathan Frid-A Personal Picture Album can be found here
http://www.luminist.org/archives/ Scroll down to author Jonathan Frid. I know he didn't have anything to do with the anthology, but that's where they put it.
You can also find 23 Ross novels and HODS here. This collection includes Barnabas, Quentin, and the Vampire Beauty which is often found offered at absurdly high prices on eBay and other places. The mobi (kindle) links don't work, but the PDF and TXT files do. I pasted the text from the TXT files into Word. The PDFs are image scans of the actual pages.
https://archive.org/details/RossMCauldronOfEvil?q=%22Dark+Shadows%22+Vampire+Beauty