Java EE 6 Pocket Guide by Arun Gupta
Summary: Must have
This is simply a must have. I know you can always refer directly to J2EE specification, but from time to time, all you need is a short sneak peek. That’s what this book is designed for. To give you this kind of short references in most commonly used areas of J2EE development. You don’t have to go through long lasting code listings, and learn the technology, instead, you get just bare facts. You simply get as much as you need.
One remark. If you are new to J2EE, feel free to buy this one as a future reference, but you will definitely need some other title to get started (e.g. Head First Servlets and JSP, or EJB 3 in Action – depending on your main area of the interest).