Affiliate marketing is such a mixed bag. I absolutely love it when people can monetize their writing by adding some affiliate links that are relevant to the audience - win/win for all sides. Yet it is as slimy as anything else when the sole purpose of creating content is to publish affiliate links.
Eh, I've shared your views before. But Amazon affiliate link payouts are trash. The OP made it to the front page of HN, but I'd be surprised if he makes more than $100. It's possible, but probably highly unlikely. Let him them make some money, it's a cool project.
But, OP, if you're going to have this, disclaimers, and a privacy policy are really important (especially for collecting emails).
My bad — probably should’ve added a disclaimer :) For what it’s worth, I only added sponsored links to the top ~50 books out of ~10k total. Mostly just trying to cover the cost of a decent domain so I can keep the site running.