This book explores three separate problems while pointing the correct use of Foucault's method in various analyses.
First part of the book (some 50 pages in) explains basic Foucault's concepts like archaeology, genealogy, discourse and so on and how they relate to Foucault's methodology in general. Personally, I found this part of the book most interesting and useful.
Second part of the book, and most extensive one deals with philosophy of science and sociology of science, mainly theories of Bruno Latour and Thomas Kuhn. It gives an account of the usage of Foucault's method by the thinkers like Latour (Michel Callon). This part has left much to be desired from, as it doesn't really concentrate on Foucault, but Latour. Whether Latour really uses Foucault method or not is open to discussion.
Third part deals with employing Foucalt's methods in culture studies. It gives and example of reading classes for children. The focus point of this example is analyses of how the culture acts as management rather then factory of meaning in creating new citizens.
The book also uses fictional characters of students who study Foucault. The purpose of this is to show where they use Foucault's methods in the wrong way or how they transcribe their meaning to the Foucault's ideas in the process of taking various classes on Foucault.
Initially I found the concept inventive, but then I think it started to get in the way of actually discussing Foucault's method.
Overall the book could have been better if it concentrated more on Foucault as promised by the title.