JavaScript Book Recommendation

I just read JavaScript: The Good Parts by Douglas Crockford.

Excellent introduction to Javascript, I wish I had read it years ago.

The author tries to stick to just the “good parts” of JavaScript, and does a great job of that, so you'd probably also need a JavaScript reference of some sort as a companion. It is, however, an introductory book I would recommend to anyone coming to JavaScript from a more classical OOP background.