docs(guide): add link to book

Author: Christopher Hiller

docs/content/guide/index.ngdoc

@@ -128,7 +128,7 @@ This is a short list of libraries with specific support and documentation for wo
 
 ## Learning Resources
 
-* **Books: **[AngularJS](http://www.amazon.com/AngularJS-Brad-Green/dp/1449344852), [Mastering Web App Development](http://www.amazon.com/Mastering-Web-Application-Development-AngularJS/dp/1782161821), [AngularJS Directives](http://www.amazon.com/AngularJS-Directives-Alex-Vanston/dp/1783280336)
+* **Books: **[AngularJS](http://www.amazon.com/AngularJS-Brad-Green/dp/1449344852), [Mastering Web App Development](http://www.amazon.com/Mastering-Web-Application-Development-AngularJS/dp/1782161821), [AngularJS Directives](http://www.amazon.com/AngularJS-Directives-Alex-Vanston/dp/1783280336), [Developing an AngularJS Edge](http://www.amazon.com/Developing-AngularJS-Edge-Christopher-Hiller-ebook/dp/B00CJLFF8K)
 
 * **Videos: **[egghead.io](http://egghead.io/), [Angular on YouTube](http://youtube.com/angularjs)