From Wikipedia: "Erlang is a general-purpose concurrent programming language and runtime system. The sequential subset of Erlang is a functional language, with strict evaluation, single assignment, and dynamic typing. "

This book (together with multi-core processors) could toss Erlang into the mainstream.

Books from the Pragmatic Programmers have a very good reputation and after reading the first chapter, I'm sure that the Erlang book will be both informative and amusing to read.

Yeah it is a great book! Opened my mind to how Concurrency Oriented Programming should be done.