Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not exactly what I expected

Personally I expected more helpful hints and techniques for improving your skills in voice-overs but instead most of the book is concentrated on advising how to promote your talent. So if you want to know how to be a voice-talent this is propably not the best book for you, but if you feel you already have what it takes to be a voice-over artist, it gives you advise what to do to get yourself into business.