The book of Isaiah has more references about the Messiah [Christ] than any other book of the Old Testament.
About the book of Isaiah we read in Unger's Bible Handbook:
Every glory of our Lord and every aspect of His life on the earth are set forth in this great evangelical prophecy: His deity, eternity, preexistence, creatorship, omnipotence, omnipresence, omniscience, incomparableness (40:12-18; 51:13); His incarnation (9:6; 7:14; cf. Mt 1:23); His lowliness and youth in Nazareth (7:15; 9:1-2; 11:1; 53:2); His appearance as the Servant of the Lord, anointed as such (11:2), and chosen and delighted in a such (42:1); His mild manner (42;2); His tender ministering kindness (42:3; Mt 12:18-20); His obedience (50:5); His sufferings, etc.. .
As we read the book we need to keep in mind that this book is considered the gospel of the OT. As we progress through the book we will get a greater appreciation of the work of salvation of our Lord and Savior Jesus Christ on our behalf.
Happy readings!