The book (O'Reilly's High Performance Web Sites: Essential Knowledge for Front-End Engineers): <a href="http://www.amazon.com/High-Performance-Web-Sites-Essential/dp/0596529309/ref=sr_1_1?ie=UTF8&s=books&qid=1242935754&sr=8-1" rel="nofollow">http://www.amazon.com/High-Performance-Web-Sites-Essential/d...</a><p>And his upcoming book (O'Reilly's Even Faster Web Sites: Performance Best Practices for Web Developers): <a href="http://www.amazon.com/Even-Faster-Web-Sites-Performance/dp/0596522304/ref=sr_1_5?ie=UTF8&s=books&qid=1242935754&sr=8-5" rel="nofollow">http://www.amazon.com/Even-Faster-Web-Sites-Performance/dp/0...</a>