Originally written by Bjarne Däcker and later revised by Robert Virding, the Erlang Handbook is a summary of the language features and the runtime system. It is aimed at people with some programming experience, serving as a quick introduction to the Erlang domain.
The current release can be obtained here.
Errata and Improvements
This is a live document so please file corrections and suggestions for improvement about the content using the issue tracker. You may also fork this repository and send a pull request with your suggested fixes and improvements. New revisions of this document will be published after major corrections.
More info here