High Performance Web Sites by Steve Souders Posted on January 15, 2015 by Shabbir Mirza This book is a very good introduction to website performance optimization for front-end developers. http://www.amazon.com/High-Performance-Web-Sites-Essential/dp/0596529309/ref=sr_1_1?s=books&ie=UTF8&qid=1418058621&sr=1-1&keywords=high+performance+websites