If you'd like to create web-based applications easily, then this book is for you. More importantly, it shows you how to do that with joy and feel good about your own work! You don't need to know servlet or JSP while your productivity will be much higher than using servlet or JSP directly. This is possible because we're going to use a library called "Tapestry" that makes complicated stuff simple and elegant.
The first four chapters are freely available on http://agileskills2.org/EWDT. You can judge it yourself.