Do you guys know a work that talks about Plato's dialogues as a colection of techniques of thought?

I know this may sound kind of obvious, but, for instance,

- Hippias Major is the attempt to define something from what we know, but then showing the limit, hence we have to abandon the knowledge and restart later with more knowledge.

- Phaedrus has some techniques, but as I recall one of the main ones is the idea of, from an single object (argument) realizing the group in which it is part (the technique of argumentation, sophistry) and then studying the nature of this group by subdividing it in categories. [this is, by the way, what I'm trying to do with the dialogues themselves]

and so on.

I'm still pretty new on this, so I just read some dialogues. I do read philosophy, but I hadn't have the chance to read studies about them.

So, would you guys recommend me something on that line of investigation?