Embedding a framed site into my page (iframe doesn't work)

I’d like to be able to embed this website into a page:
https://www.sterlingcodifiers.com/codebook/index.php?book_id=954

When I add that site to my page using iframe, it looks like this:
https://www.fathill.com/?page_id=33

I’d guess that the problem is the target site is all framed up itself, so the links don’t work correctly.

Is there another way to do this?