I just published the latest of my REST API Notes. Mark Boyd has a tremendous piece on what it takes to take a service interface and make it an API Product. In addition to that, I go down the microservices rabbit hole with Daniel Bryant, among others.
You can find the web version of the newsletter email here: http://tinyletter.com/NetAPINotes/letters/rest-api-notes-for-2016-10-11
Past editions of the newsletter can be found here: http://tinyletter.com/NetAPINotes/archive.
A comprehensive list of upcoming web events that I maintain can be found at webapi.events.