I’ll start with something that is fresh in my mind - the opening chapter (and preface) to Programming Phoenix 
It made the hairs on the back of my neck stand up!
You can read both the preface and the introductory chapter for free!
Here are some of the topics it covers:
- Rails Developers Seeking Solutions
- Dynamic Programmers Looking for a Mature Environment
- Java Developers Seeking More
- Erlang Developers Doing Integrated Web Development
- Heat Seekers
And…
- Speed
- Concurrency
- Beauty
- Simple Abstractions
- Effortlessly Extensible
- Interactive
- Scaling by Forgetting
- Processes and Channels
- Reliable
Obviously these are with Phoenix in mind - but then, Phoenix itself is the perfect tech to showcase the draw and power of Elixir 
If you’ve not read these chapters you are truly missing out!
Read them for free here:
