Instruct: Classify a review into positive or negative sentiment.
Query: Save your money

Very disappointing. There is not a single piece of information in this book that is not available for free by reading about a month's worth of messages on the "Seller Connection" discussion board that Amazon provides as part of its Seller Resources. The author doesn't seem to have taken the time to do even the most rudimentary independent research. For example he recommends the envelope vendors usually mentioned on the board, whereas a simple independent google search finds a number of cheaper vendors!Of course if you like free information pre-digested and neatly arranged for you, then this book is great. But if that's the case, you might want to reconsider being a bookseller, since a willingness to gather and digest your own information seems to be a basic requirement for success in the field.