Commentaries are shelved in the Reference area on Wilson 4 in the Commentary Series section, and on Wilson 1. Below you will see the 16 commentary series that are shelved in the Reference area, but there are many other commentaries shelved in the regular collection on Wilson 1. The easiest way to find them is to do a search in the library catalog for the biblical book you are researching, followed by "comment*". For example:
There are many commentaries to choose from. To help you choose the right commentary for your needs, take a look at the "front matter" of the volume you are interested in. This introductory section should include information about the commentary series, why it was published, if it has a particular theological or denominational perspective, or any other rationale for publication. This section may also include information about the series editor, the author of your volume, and any abbreviations or translation notes you should be aware of.
Generally, most commentaries are traditionally organized in the following manner:
Treier, Daniel J. Proverbs & Ecclesiastes. Brazos Theological Commentary on the Bible. Grand Rapids: Brazos Press, 2011.