Absolutely the best, and yet simplest to read, book on the baptism of the Holy Spirit, tongues, and the manifestations of the Holy Spirit. Don Basham was on the "ground floor" of the Charismatic Renewal and his insights and ministry experiences in this area are obvious by this book's content. Written in question form, one could browse the many topics and readily find an answer. I have give this book to many people who have questions about experiencing their own personal Pentacost. I would make this required reading of my church!