I've had good experiences with the Pragmatic Bookshelf's titles, but unfortunately it seems that their main Elixir book hasn't been updated in 7 years:

https://pragprog.com/titles/elixir16/programming-elixir-1-6/

I haven't been following the scene actively so I don't know how much has changed (I assume the majority of it will still work but new features might have been added since), but Dave Thomas is a great writer. I learned Ruby on Rails from one of his books and it was money.