I wrote a book last year all about the link between marketing and market research. It’s free on Kindle. I tried to write it in the style of Robert Greene, which, while definitely isn’t text book, I discovered when his book was actually my college textbook for my strategy class (taught by the same guy who taught me market research). You might dig it.
I have a tool that helps out with that, but it focuses on live results as opposed to historical analysis. I invite you to check it out: https://syften.com
You can monitor a list of topics and be notified immediately when someone posts about them.
I could also scrape some forums for you, maybe we can make a deal.