Update README.md

Author: ashleydavis

README.md

@@ -4,6 +4,10 @@ A test program to estimate how much heap memory is available to a Node.js applic
 
 This example code accompanies the book [Data Wrangling with JavaScript](http://bit.ly/2t2cJu2).
 
+There is also a related [blog post](http://www.the-data-wrangler.com/nodejs-memory-limits/) and (video)[https://www.youtube.com/watch?v=FvAghuKuak8].
+
+To keep up with my work please follow @ashleydavis75 on Twitter or sign up for my email list on my blog [The Data Wrangler](http://www.the-data-wrangler.com/).
+
 If you're a JavaScript developer, you already know that working with data is a big deal. Why let the Python and R coders get all the glory? JavaScript isn't just good at data visualization, you can move your entire data wrangling pipeline to JavaScript and work more effectively. [Data Wrangling with JavaScript](http://bit.ly/2t2cJu2) teaches you core data munging techniques in JavaScript, along with many libraries and tools that will make your data tasks even easier.
 
 ## Setup
@@ -28,4 +32,4 @@ Now try increasing heap memory, add the '--max-old-space-size' command line para
 
     node --max-old-space-size=6000 index.js
 
-You should now have much more heap memory to play with!
+You should now have much more heap memory to play with!