[devinmcafee]

I actually think that books which cover software engineering practices, rather than language specific books, have helped me the most. This is due to the fact that the concepts and principles you learn can be applied to many languages.

Two I've enjoyed are: "The Pragmatic Programmer" by Andy Hunt and Dave Thomas "Clean Architecture" by Robert C Martin

That being said, no harm in deep diving individual languages. Secrets of a JavaScript Ninja by John Resig was an excellent introduction to JavaScript!