The books from the former ETS Library are currently being added to the WSU collection. As of August 2107, approximately 25% of the books have been catalogued and shelved. Books on theological topics are available on the fourth floor of the Purdy Library.
To find books on theological topics in the library, I recommend browsing LC Subject Headings on Theology in the library catalog. Wayne State Library has entries in 562 subject headings related to Theology, and there are many other topics not under the Theology headings that are of interest to theology students (archaeology, literature, classics, etc.)
Related LC Subject Headings:
Reference books are located on the left side of the lobby of the Undergraduate Library.