The Improvisation Game

During my time travelling to and from the People’s Republic of North London and Enfield South I have been reading The Improvisation Game by Chris Johnstone.
 
I am struggling with the book.
 
It may be that it requires more knowledge than I have; that is a text for the experienced.
 
It may be that the subject matter is really much more difficult than I imagined it to be.

It may be that I am stupid.

It may be that the book is not as clear as it could be. 

Some, all, none, most or a changing selection of these may be true.