" I'm not sure which edition/translation of this book I read... The book's title is somewhat misleading,as what Spinoza presents his his own system of happiness from first principles. He asks the question "what is the greatest good and how to achieve it?" and tries to answer it using a rigorous axiomatic method. Unfortunately, at times he seems to play word games (like his definition of God), makes leaps of logic and uses terms in a different way, which hinders understanding. If you read any edition of this book, I recommend one that includes some of his shorter letters, as they help provide a snapshot view of where he is trying to go, which can aid in understanding this work. "
— Ronny, 1/28/2014