What a fantastic book on the Holy Spirit! This book is both conversational and deep because Tozer was a deep person. These are ten of his sermons on the Holy Spirit that should be repreached in today's churches (I mean in a era where pastors plagiarize and buy sermons off the internet, why not steal from better sources? My guess is that they are too deep...but I digress). Tozer made many things very clear for me in a way that prompted me to be better and push farther--not in a judgmental snide tone that is so common among Christian writers today. In reading this book, I could tell that Tozer had spent time with Jesus and knew first hand about the ministry of the Holy Spirit, and that made a big difference. Highly recommended!