Ryan Bigg (github: https://github.com/radar) has been active in the Ruby community for years (and is seriously intelligent, at least based on his many past IRC responses to my Ruby questions, assuming he's also named Radar on there), has apparently been working with Elixir on the side for a while, and IMHO can definitely handle an Elixir book intended for new programmers. He would be a very significant asset to the community were he to jump ship and go fulltime Elixir.

Your skepticism (which is otherwise probably warranted) is quite wrong in this case. I'm sorry if someone defecated into your Cheerios this morning, though.

Sometimes the best way to learn is to teach, and sometimes the best way to teach is to make money teaching. :P