The second floor of Cregan Library (St. Patrick's Campus) houses most print books related to philosophy.
Below you will find a list of the most common shelfmarks for philosophy books within the Library.
Use Library Search for online shelf-browsing (Advanced Search with Subject).
The library’s eBook holdings on philosophy can be found via Library Search.
Use the classification guide below for orientation
| Subject | Class number | Subject | Class number | |
| Metaphysics | 110 | Logic | 160 | |
| Epistemology, causation and humankind | 120 | Ethics | 180-179 | |
| Parapsychology and occultism | 130 | Ancient, medieval and Eastern philosophy | 180-189 | |
| Specific philosophical schools | 140-149 | Modern Western philosophy | 190-199 | |
| Psychology | 150-159 |