I love the entire Word of God.  My favorite book in the Bible would depend on where I am at in my walk with the Lord and what I am going through.  Right now I would have to say it would be the book of Jeremiah. In his early ministry, Jeremiah was primarily a preaching prophet, preaching throughout Israel. He condemned idolatry, the greed of priests, and false prophets. I find myself being much like Jeremiah.  I abhor and condemn idolatry, the greed of pastors and preachers, and so many ministers calling themselves prophets delivering words that are far from the Gospel truth.  I hope this answers your questions.  Thanks for asking!