The feed rewrite rule for post kinds seems to be broken. https://blog.xavierroy.com/kind/watch/feed and http://xavierroy.com/feed/?kind=watch are supposed to be the same feed, but the ..kind/watch/feed isn’t working as expected.
Great idea… Currently I run a PESOS approach involving Goodreads and Zapier that is triggered whenever I mark a book as currently reading. Once the Micropub issues on my site are resolved, I think this would be a way to go for me…