Book/Verse variable

Would be great if in the footer we could have a variable made available in the footer to represent the book+chapter. Using this we could then include a link that goes to a specific web page per page, rather than the same link in the footer of every chapter.
Applications include follow-up/discussion, on-line articles, radio programmes and bible studies about specific books etc, without having to include them in the app.
I have one case where including video with the text is considered a bit inappropriate but a footer link might be OK, but I would rather send them to that chapter’s video than give them further clicks to find the book/chapter again.
Thanks for considering.