Great collection of rss feeds.

I build my own rss feed for HN, because i want only see posts which reach >500 Points in a week [1].

So i did for a few other websites: Reddit r/programming (at least 500 points / week)[2] Producthunt (at least 300 / week)[3]

What I'm searching, is a rss feed where i get notified when a book author release a new Book. Unfortunately i didn't found one.

[1] https://us-central1-social-channel-notifier.cloudfunctions.n...

[2] https://us-central1-social-channel-notifier.cloudfunctions.n...

[3] https://us-central1-social-channel-notifier.cloudfunctions.n...