Programming Phoenix 1.4 is probably the best book. Very friendly and easy to follow (and written by the Phoenix and Elixir creators) https://pragprog.com/book/

Programming Phoenix 1.4 is probably the best book. Very friendly and easy to follow (and written by the Phoenix and Elixir creators) https://pragprog.com/book/phoenix14/programming-phoenix-1-4 https://pragprog.com/book/phoenix14/programming-phoenix-1-4