Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Editor Seriously Needed

Just to reiterate what others have said, this book has so many errors it is difficult to trust it at any point at all. Whenever an author has trouble spelling "OSPF", (spelled "OPSF" numerous times) you know there are going to be other issues. I never write reviews, but felt it was my duty in this case to warn others. The material is difficult enough already without having to deal with this confusion.