Is there a word that means - of or related to books?
Solution 1:
I think you could stretch the word bibliophilic to fit your sample sentences. It's not a direct equivalent to sartorial etc, but I think it would be well understood in the context. One definition is "having, or pertaining to, bibliophilia (the love of books)."
Solution 2:
@Tom22 is right in the comments. I think "literary" is the closest you can come, but refers to literature ("written works, especially those considered of superior or lasting artistic merit." according to Google) which is not exactly the same as books.