If you have ever wondered why so much of London looks like it does - the Gherkin,The Wembley Hoop, City Hall, the Tate Bridge - this book is worth your time. It also gives a good account of how and why the practice of architecture has changed so much in the last twenty years. Foster himself is presented as a driven and ambitious man whose personal story would rival that of any Victorian entrepreneur. Much is offered about the major architectural figures of the twentieth century, and even if you know little about them, the book provides enough detail to take the story forward. What it lacks is decent illustrations of their work and that of Foster: the images in the book are small and not very informative in relation to the arguments offered. An 'authorised biography' probably implies that there is little personal gossip about Foster - good - but it also means that any serious critical analysis from an unsympathetic point of view is also absent. We learn a lot about what Foster did and a bit about why he did it but nothing about how we might be able to compare and judge his work in relation to his peers.