Commentaries give you the opportunity to see what scholars have written about the text you are studying. You will find both full-scale or multi-volume commentaries (a set with any number of volumes where individual books within the set are devoted to a small section, book or few books of the Bible), and single-volume commentaries (one single book which covers the entire Bible).
The Library's collection contains many items in the Reference Collection, in the Main Collection, and online.
If your Bible Commentary eBook links are not working: