I love the idea of a book that encourages kids to not let being a princess be the end goal, and that they should aspire to be a princess who does something. I also love that a variety of countries were highlighted, although the world map with the princess-less Americas gave me a little laugh.
There was definitely an issue of some of the entries being stronger than the others (Princess Abze Djigma, who is one of the first in the book, is perhaps the best of the lot). I believe the book will quickly become dated too since it only looks at current princess; the book may have been stronger is some of the entries were changed out for historical ones.