Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good Book to grasp the atheist perspective

I read this during my transition phase. It really makes you think and clearly demonstrates why there are doubts for the existence of the (Christian) God. It gives solid rebuttals to several supposed arguments for God. This book by itself probably won't persuade you one way or the other, but it will challenge your beliefs and adds to the "debate" in a civil way.