Node.js is just JavaScript running on the server side. That's it. That's all there is to it.
- Express Docs, if you want to get started and already know JavaScript this is the place to be
- JavaScript For Cats
- A Re-Introduction to JavaScript
- JavaScript Reference
- JavaScript Guide
- Why Use Closure
- Prototypal Inheritance
- Control Flow in Node
- Truthy and Falsey Values
- How to Write Asynchronous Code
If you are interested in Backbone.js, here is a free draft of Diving Deeper into Backbone.js chapter for Rapid Prototyping with JS book on Node, Mongo and JavaScript: https://github.com/azat-co/ga-backbone.
Another great free resources on Backbone.js: