Link, tag or index - can't decide in this case.
Hi! I love writing short essay reviews about classic literature books and I want to connect them somehow. The only thing is that I don't know how. The books are not connected to each other in any way, yet they share one major point: all of them are book reviews.
In the picture, attached below, I used double brackets to link them to a centrail point (book reviews). Should I just tag (#) or should I make the central point (book review) as an index?

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Comments
This is just how I would do it... but it depends on how many book reviews you'll write. With this many (10), it's about the same whether you use links or tags. But if you end up writing a large number of reviews, this note linking them all would start to become unwieldy. It would just be a long list of links, and that would seem to be a kind of 'fake' way of connecting them.
If it becomes lots of reviews, a tag starts to make more sense as it's a more natural way to connect things that are initially not naturally connected.
That's just my two cents, but definitely experiment and see what feels more useful to you.