Thanks for the question Valentin.
There are a few differentiators between Enterprise Ajax and other books available on the topic of Ajax.
First of all we take a close look at some of the features of the language and how classical development approaches (inheritance, interfaces etc) are achievable in the JavaScript language. This means that rather than picking up a third party solution we give the readers the JavaScript tools to understand how things work under the hood and are able to relate them to classical languages like
Java or C#.
We also discuss topics that are rarely touched on by other books such as design,
testing, debugging, performance and deployment as well as security, caching, scaling and web services. We feel that all of these topics are of particular interest to enterprise developers.
Finally, we also spend a good deal of time in the book discussing some of the softer issues in Ajax such as usability, accessibility, and even look at some enterprise case studies of how real companies are leveraging Ajax in their enterprise solutions.