To be honest, I cannot see the area in question that well to be sure it is “CD jewel cases”.
The “Carousel” was not a book, but a Kodak slide projector (our organization has this very model, just as old). More evidence you cannot tell what those slivers of light on the shelf are, certainly if you cannot tell the big thing is not a book.
However, I think the film seems very fresh. It’s possible, but doesn’t seem to usually happen.
You are right, it is difficult to confirm that it is a CD-jewel case, but it raises doubt, none the less.
I called it a book, frankly I was focused on the “jewel case” and did not give the “carousel” too much thought.