If you're already working with Ext JS and are looking to extend your knowledge as a team leader, or are simply looking to understand how to design and structure your applications, this book is for you. We won't stop and explain every little facet of Ext JS, and we'd expect that you have a good grasp of the fundamentals of the framework. We'll encourage problem solving, rather than coding-by-numbers, so a positive attitude and desire to learn is essential!