Advice on using hooks / elements or blocks for repeat content (Dispatch theme)

Hi,
I'm hoping for some advice regarding "repeat content". On AlternativePhotography.com I sell a couple of books that I would like to "plug" at the end of posts. One book can be on for example 10-30 different posts which makes it a pain to update when one of the links change or something like that.
So, my question is: Should I create and "element" with a "hook" for bottom of the content "generate_after_main_content"... or is there a better way of solving this with blocks or something else?
Here is an example of content I would repeat:
https://snipboard.io/g2eUr5.jpg
Thank you. :-)