Armstrong J. Programming Erlang. Software for a concurrent world

Learn how to write truly concurrent programs — programs that run on dozens or even hundreds of local and remote processors. See how to write high reliability applications — even in the face of network and hardware failure — using the Erlang programming language.
Erlang is a programming language designed for building highly parallel, distributed, fault-tolerant systems. It has been used commercially for many years to build massive fault-tolerant systems which run for years with minimal failures.
Erlang programs run seamlessly on multi-core computers. This means your Erlang program should run 4 times faster on a 4 core processor than on a single core processsor, all without you having having to change a line of code.
Erlang combines ideas from the world of functional programming with techniques for building fault-tolerant systems to make a powerful language for building the massively parallel networked applications of the future.
This book presents Erlang and functional programming in the familiar Pragmatic style. And, it’s written by Joe Armstrong, one of the creators of Erlang.