Scrum is a simple emperical process of project management. There are few rules and these are adequately explained in a few pages and within the appendix of this book. So what, you might ask, is the rest of the book taken up with.
Well there's lots of case studies to demonstrate the practical use of Scrum in different scenarios. I must admit to having found these case studies a little uninteresting at times and a bit repetitive, however by the end of the book I feel I probably appreciated their purpose more than I did whilst reading them.
In terms of whether the book is worth owning, I found it well enough written and in general quite useful, however I do feel the meat of the subject can be summed up in far fewer pages and I'm split between the feeling that fewer case studies would have been adequate and that some were just "fillers" to pad out the book and the fact that, maybe, you can never have too many examples.