Middle school students are often given assignments to design a town or an island and incorporate elements of units they are studying, so I really enjoyed the sections on what constitutes a good city and think it might be very useful. There are so many places in the US where architects have not scaled things to human size, developed local style, or made the area lively for pedestrians, so they could certainly use this book. On the down side, anything outside of the western European cannon is seen as exotic, and the idea of "beauty" is a bit narrow and comes across as rather judgmental.
Taken with a grain of salt, this is an interesting and quick read. Since there are so few books about architecture for young readers (other than David MacCauley's wonderful works like City), this fills a lacuna in nonfiction literature for children.