title_body: How do I convert an RSS feed's entries into an ebook?
upvoted_answer: If all you're wanting is to easily get specific RSS items to a Kindle, Instapaper has a service that makes this very simple:
  
  http://www.instapaper.com/user/kindle
  
  That's how I do it, and only for specific posts that I'm actually wanting to read on my Kindle. My usual workflow is when I'm reading through my feeds on my iPhone, I click "send to Instapaper" on longer posts that I want to read on my Kindle.