Too complicated, mediocre book

This book is not for beginners or to try to understand the game theory to those who have little knowledge in mathematics.
Myself and having student with Game Theory among my various subjects studied, I bought this book to understand my course, gold is the opposite happened. I need occasionally occur 20 minutes to understand what is written in a page, see 1h for some examples. In the end it's my class that allows me to understand this book than the reverse.
Moreover everything is mixed, the author introduces each time new vocabulary without explaining what it is.
Basically it's a good book to the proper review when game theory is already an expert in the field.