Psalm 40: 7: Then said I, Lo, I come: in the volume of the book it is written of me,
Jesus was the Word in flesh; He was the volume of the Book walking upon the earth.
Luke 4: 17 - 21: And there was delivered unto him the book of the prophet Esaias. And when he had opened the book, he found the place where it was written, The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised, To preach the acceptable year of the Lord. And he closed the book, and he gave it again to the minister, and sat down. And the eyes of all them that were in the synagogue were fastened on him. And he began to say unto them, This day is this scripture fulfilled in your ears.
The scroll of Isaiah was given to Jesus for Him to read before the people.
Isaiah consists of 66 chapters and is the entire Bible (which consists of 66 books) in condensed form. So the fullness of the Word (the scroll of Isaiah) was given to the fullness of the Word (Jesus), and the Word Himself took the Word Itself and revealed Himself in Itself.
Jesus’ ministry happened at the conclusion of the Old Testament. It was at the end of the Old Testament that Jesus took a closed book (Isaiah) and opened it to reveal Himself in the Word that was till that moment sealed from the people. He was the Lamb (Revelation 5: 5 - 6) taking the Book to identify Himself; He was now that portion of the Word in Its expression; Jesus was that living Word made flesh.
As the Son of Man revealed Himself in the book that He opened at the conclusion of the Old Testament, so likewise did the Son of Man (Christ) reveal Himself through a son of man (Brother Branham; Malachi 4: 5) at the end of the New Testament when the Book was opened to us via the preaching of the seven seals.