Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Outstanding, especially in light of other ecommerce books

I picked up several internet business books that talked about ecommerce and this one is the best of the bunch -- good introduction, specific examples, surprisingly strong writing. Made me even write a review! My only complaint is that it reads a bit dry at times. It should be noted for potential buyers that this book is almost totally focused on business to consumer advice and has perfunctory coverage of business to business ecommerce.