The book is not for everyone. It presumes that the reader has a quite comprehensive knowledge about the last 1,000 years of world economic history and some training in Economics. Nevertheless, it is a must if you are a serious researcher of any of these issues.
The book has changed my mind on several issues, mainly about the Industrial Revolution. I used to take the New-Economic-History side: it was slow and foreign markets were not important. Now I am not so sure at all. The bottom line: Power and Plenty is a great book!