I have been a web-developer for 6 years. I recently started using fusebox 4.0 but had several problems with this book. Firstly, they omitted putting an index in the book. Secondly, some of the fusebox/xml examples within the book themself do not even run because the code is bad. Lastly, many of the examples and concepts are not explained very clearly. I think that this book could have been written much better.