Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Pie in the Sky with no technical backup - worthless

My title says it all. This is one of those "hand wave across the map" kind of books, and to call it a textbook is doing it quite a favor. If that's what you're into - a lot of dreams with no technical info to back it up, this book - and the most recent Starfleet manual - are for you. If you genuinely want to learn about real subjects in the area of high performance computing and networking, tho, skip this thing with prejudice.