I disagree with this.
"Resource Recommendations" is a generalisation of "Books". Many people, when wanting to learn a topic, wouldn't immediately fix it that they will only read a book, no research papers, no PhysicsOverflow answers, no blog posts, no lecture videos, nothing.
I, for example, before learning Quantum Mechanics from a book, only watched the NPTEL lecture videos.
Many cutting-edge topics, like Matrix String Theory, have few books about them, except for Becker, Becker, Schwarz, which was just published like 5 years ago. The best resources, as Lubos Motl has often said, are still the papers themselves (of course I like BBS too, but if someone were to not read the original papers, by Motl and Banks during Lubos's PhD, they would be missing something).
How many books will you find about the amplituhedron, or the ER/EPR correspondence? Few...
There are so many resources other than just "books", research papers, lecture videos, lecture notes, talks, conference proceedings, blogs, wikis, q&a sites, our own tag wikis that are to come soon, forums, our reviews which are to come soon, haven't you heard Ron talk about the importance of the internet, and so on ?
Naming the tags "books" is like naming it "lecture videos" or "physics overflow tag wikis" or something.
Of course, I do agree that "Resource Recommendations" sounds very political-ish, and it is a bit toooooooooooo formal; maybe "Resource Requests" or "Resources" would do.
Yes, "Resources" sounds right. Even "Reference Requests" should just be "References". The tag wiki can explain what is meant, and maybe even link to this very post.