Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A sure way to increase sin

Wow. This is bad. This book is extremely legalistic and will only strengthen sin in a person's life (2 Cor 15:56). It makes people feel good about themselves b/c it plays to our sense of self-effort and self-righteousness. It has the appearance of working for a time but is incapable of producing the power of God that permanently changes a person. At best, the reader will read this, try it, exhaust it, come to the end of themselves and give up. Then God can get involved.