I read this last year and it is incredibly insightful.

Bart Ehrman brings to light accurate history of our most revered book. He gives a historical, logical and personal summary of how the Bible was manipulated to convince the masses regarding the concepts of God, his values, and demands of the human race. I was convinced that the Bible is a human book written by humans. It lost relevance for me after reading this and other books by Ehrman. I've already read it 3 times!