I was going to start with grandiose claims such as "This book can change your life" or "This book can save your life". That is far to sensationalist, and when you actually read this book, you will see that it does not make such crazy claims.
However, I'm going to go out on a limb and speak from my own experience. "This book can change your POKER life" and "This book can save your POKER life" I stand by these statements.
I have read the book from cover to cover once, don't think your work is done there....It isn't.
In my opinion, this book should be considered a tool, much like bankroll management, game selection and even tracking software. You should refer to it, re-read it, write notes from it etc etc.
The Mental Game of Poker is a complete resource to help you tackle with many aspects of the mental game, some of which you are currently facing, and some that you have yet to face.
I advise you to get yourself a copy of this book, whether you are a recreational player or full time grinder.
We all can experience problems of tilt, frustration, lack of confidence etc......
Whatever the stakes ;)
Run good.