Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't buy this book based on it's title.

I was very disappointed in this book. I was looking for a book on SS7 and SS7 over IP. This book is more of a chapter from a book. 21pages, mostly diagrams of signaling layers. This e-book does little to nothing to explain concepts in it's title. Unless you want to pay 8 bucks for a few good definitions of very well known technical words, don't waste your money. The only thing that I will say good about this book is that Lawrence Harte at least used his spelling and grammer check when writing it.