Add Secrets of the JavaScript Ninja to list of books

You've put together a great guide, thank you for that.

I think [Secrets of the JavaScript Ninja](http://www.amazon.com/Secrets-JavaScript-Ninja-John-Resig/dp/193398869X) is an excellent read - it's up there with all the other books you have listed. If you agree with me, then please do merge my pull request :)