This book is a very short one with around 18 pages of real content. It immediately starts with the history of Web/HTTP and then somehow manages to introduce the concept of WebSockets and its importance. I dont think the history was necessary. Author could have started from Ajax and then introduced Comet and then WebSockets.
And in the introduction chapter there is an example of Pirates which made me a bit confused about my understanding of the WebSockets. In all the introduction occupies close to 50% of the book.
Then when it comes to the real content- there's nothing much useful. In no way I could run those examples without the Server running. And there was no mention of how to go about creating the server for trying out the example code given.
This book on WebScokets is not worth buying because one can find lot of better articles for free on the web. I would not recommend this for buying.
Disclosure: I received a copy of this book from the publisher in exchange for writing this review on behalf of CodeRanch.