@otaviocc Thanks, I'll update the book. I think there are a couple problems: you're right that Micro.blog wants an array for mp-channel. Usually Micro.blog accepts both array and single value, so I'll fix that. I think mp- fields are usually not arrays. Also, mp-navigation is at the root level, not inside properties. (I think mp-channel maybe should be at the root level too, like mp-destination… Need to review that.)