Symphony.

I'm building a site in which I'd like to allow users to compile their own PDF of articles from entries that they are interested in as they navigate through the site's pages.

Entries to be added to this PDF could contain text and/or images.

I came across Session Monster and thought that this could be what I'm after, but I'm curious to know if anyone's tackled this before and if so, what strategy they used.

I'm not so concerned about the PDF creation stage at present (but I'd be happy to hear suggestions); at the moment, I'm more interested in how to collate the user-specific data.

Check out this extension by brendo for pdf generation.

Session Monster is usually a good choice for this kind of use cases.

Excellent –- thanks, alpacaaa; I'll press on with Session Monster and I've starred urltopdf.