I bought this book primarily to read about writing RESTful Web Services with JAX-RS which is one of the two topics mentioned in the product description.
I must say I am really disappointed with the coverage of this topic. Not many pages are devoted to it, and there are also some flaws in the presentation of REST and in the examples. For example when describing HTTP GET, the author equals "side-effect-free" with "idempotent", which is wrong. The Representations (the XML-formats) are strange, for GET they are serialized Java-objects without any semantics, for POST they are XMLs with the verb <create_team> as the root-tag.
The presentation of JAX-RS (Jersey) is only 4 pages, and far from what I need to do something useful.
As for the rest of the book I don't know, so the rating is based on the presentation of REST and JAX-RS.
I bought this book together with the "Java SOA Cookbook" by Eben Hewitt, and I also have read "RESTful Web Services" by Leonard Richardson. The chapter on REST and JAX-RS in the "Java SOA Cookbook" if faaar better, and "RESTful Web Services" is a good general introduction to REST.