This book is composed of two parts: a dressing guide and a shop directory.
The first is very basic and actually covers only a very formal and very classic style. No space for creativity here: just a recap of the main rules of formal-business wear, with the mistakes to avoid, with some simple b/w drawings here and there to better illustrate points. Explanations are clear and coincise, if a bit unexciting. This book will surely help the dressing-challenged, but it will never make you shine. Basically, a "Dressing 101" treatise and nothing more.
The second part, which also takes up the bulk of the book, is just a list of shops. There is plenty of names and reviews, but will still they be there in 10 years? (Oh yes, if you can still find them, they should be good at what they do, I suppose). It can be a good reference for the businessmen travelling in Europe, but I'm afraid too much information could be outdated.
In a nutshell, this is a book for those who don't really care about fashion and just want to look good in a business or formal context without too much fuss. A very "do this, don't do that, buy there" approach. Flusser has done better things, at least in my opinion of quasi-fashionista.