The Prophecy of Isaiah: An Introduction & Commentary (J. Alec Motyer) It is a one volume commentary that numbers at close to 550 pages. Motyer offers a very good introduction to the book especially dealing with the controversial authorship of the prophecy. Motyer divides the book and renders Isaiah 1-37 as the book of the king, chapters 38-55 as the book of the servant and finally Isaiah 56-66 as the book of the Anointed Conqueror. He also points out three themes that are reoccurring throughout the prophecy mainly the Hope of the coming Messiah, the city and an outline of the Holy One of Israel. There is no question that this is a must have for anyone who is willing to examine the book of the prophecy of Isaiah.
An Exposition of Isaiah (H.C. Leupold) I must make my readers aware that this is not an easy volume to get your hands on since it has been out of print for quite some time. The book is a wonderful companion to Motyer and whatever he is lacking, Leupold fills the gap. This is a great commentary analysing the prophetic texts from the Amillennial perspective.