The book is a tutorial, leading the reader first through the basics of the YUI library before moving on to more complex examples involving the YUI controls and utilities. The book is heavily example driven, and based around an approach of tinkering and extending to improve. This book is for web developers comfortable with JavaScript and CSS, who want to use the YUI library to easily put together rich, responsive web interfaces. No knowledge of the YUI library is presumed.The book is a tutorial, leading the reader first through the basics of the YUI library before moving on to more complex examples involving the YUI controls and utilities. The book is heavily example driven, and based around an approach of tinkering and extending to improve. This book is for web developers comfortable with JavaScript and CSS, who want to use the YUI library to easily put together rich, responsive web interfaces. No knowledge of the YUI library is presumed.