Every adult Sunday School teacher would do well to collect up a few commentaries over the years. I recommend getting them in electronic format. I use both WordSearch and Logos.
In no particular order here are some of my favorite commentaries for Bible Study:
- Holman New Testament Commentary
- Bible Exposition Commentary (BE Series)
- Barclay’s Daily Study Bible (NT)
- Preaching the Word
- MacArthur New Testament Commentary
- The Preacher’s Commentary Series