I've just submitted a review to Amazon on John Oswalt's New International Commentary on the Old Testament volume on Isaiah 1-39.
I enjoyed reading through Oswalt's commentary on Isaiah 1-39 while teaching a Bible study on it. It's the most comprehensive commentary from a conservative evangelical perspective, much better than its predecessor in the series by E.J. Young. I share more theologically with Young and Alec Motyer's commentary, but Oswalt is balanced most of the time and presents so much more information that I wouldn't want to use either of the others without his commentary.