I personally think an excellent place to start is the approved list for training by FIDE:
http://trainers.fide.com/recommended-books.html
Many of the books you would expect are there such as various by Aagaard, Dvoretsky, Yusupov, Kasparov, Silman, etc.
The Soltis you mentioned is there. I'm somewhat surprised the Zurich 53 tournament book is not. But not many tournament books are.
Bronstein's book is number 26 on the May 2018 list.
By the way, thank you for the link. The list is fascinating and I didn't realize before that it existed.
The list is alphabetical(check the names of the authors).
One thing to note , no opening books in either the list for players or the list for trainers!
I was thinking the same, but I find it strange that all game collections have the level 'K'. Is the study of collections like Zurich 53 reserved for masters?
You're right: my theory doesn't fit in all cases. A more definitive explanation would be quite helpful.