J. Dwight Pentecost is Distinguished Professor of Bible Exposition, Emeritus, at Dallas Theological Seminary where he has served since 1955. He holds a B.A. from Hampden-Sydney College and both the Th.M. and Th.D. from Dallas Theological Seminary. His nearly twenty books include Design for Discipleship: Discovering God's Blueprint for the Christian Life; Your Adversary, the Devil; and The Divine Comforter: The Person and Work of the Holy Spirit.
I cannot recommend this book highly enough. It is very Bible-centered--as it should be--and Pentecost covers the many aspects of the Holy Spirit succinctly but thoroughly. He dives into the Greek language to explain certain concepts (such as kosmos) to broaden and deepen the reader's understanding of who is and what does the Holy Spirit do. Every chapter is worthwhile. This book is very readable and not technical.