Programming Phoenix is also excellent. I think it helps that it was written by the core contributors to Phoenix itself (including Jose Valim, who created Elixir

Programming Phoenix is also excellent. I think it helps that it was written by the core contributors to Phoenix itself (including Jose Valim, who created Elixir). I really appreciated not only looking at how things work, but also why they work in the way they do. The authors clearly have a real sense of excitement about Phoenix and its contagious.