Holy Spirit is the third person of the Triune God - God the Father, God the Son and God the Holy Spirit. They are not three Gods, but they are three in One. Their roles as seen in the Bible are different from each other. They all work for common goal. Inasmuch as the Holy Spirit is the living person, we do not refer Him as \"it,\" but we refer Holy Spirit as \"Him.\" \"But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me\" (John 15:26) Holy Spirit convicts of - SIN - RIGHTEOUSNESS - JUDGMENT This book deals with the specifics of the functions of the Holy Spirit, and His role in the Godhead, as seen in the Bible.