I appreciate this seminal soccer book, including its brevity. The authors go to the essential, in the style of the book of Kernighan and Ritchie. A little experience of an object such as lanquage c ++ seems necessary to make the most of it. The only gripe I had was the choice to use the EBNF notation to present the syntax. Furthermore I wish to emphasize the responsiveness of authors and their availability to respond to emails from their readers.