Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor quality material.

The author claims he is "authorized to transmit material" - well not on the evidence presented in this book. Sometimes we can be so full of ourselves...A serious factual error on page 2 (repeated later in the book, and undermining the credibility the author professes to have), mis-spelling the names of his 'teachers', numerous typos, gross generalisations and dumbing-down of essential material do not bode well for this book.Add to this some mundane re-hashing and hackery of ideas (expressed concisely and appropriately outside this book by others clearly more qualified), a penchant for tittle-tattle, other people's stories, name-dropping, self-promtion and low-level writing skill points inevitably to the conclusion that this line of work demands much finer product in its representation.Any old rubbish will not do.