If I could only pick one I’d go with Elixir in Action as it really gets into OTP. If you’re somewhat familiar with FP and other languages I think you’d get more about what makes BEAM different from that book. It is being updated to current Elixir, see here for more details What should I keep in mind if I'm using Elixir in Action today?
It’s always worth keeping an eye out for Manning deal of the days and discount codes
(Disclaimer I haven’t read the Little Elixir book so can’t say whether it’s worth picking up first or not).
