add one book

Author: Pana

Node.js Products and Expertise.pdf

@@ -8,6 +8,9 @@ If you are a new guy to JavaScript world, there are also some JavaScript books i
 
 # Recommendation
 
+### [Node.js Products and Expertise]()
+The Essential Node.js Cheat Sheet. Node.js is a set of libraries for writing high-performance, scalable network programs in JavaScript. It has an asynchronous programming model for lightning-fast speeds, and it allows programs to run JavaScript on the server-side so that both client and server can run using the same language. Recently updated for v0.12, this Refcard covers architecture, installation, API guide, developer tools, and more.
+
 ### [Express Web Application development](http://expressjs-book.com/)
 ![](http://expressjs-book.com/wp-content/themes/ewad/book.png)