The following is a link to the Catholic University online bookstore, where you can search for course material information as submitted by your professors. If a particular course or courses does not list any materials, then you should plan to hear directly from your professor(s) via email, via their TWEN or Brightspace course, or via their syllabus on the University syllabus database.
CatholicU Online Bookstore (via eCampus)
In addition, for 1L students, here is a booklist showing, within one document, the books/materials needed for your Spring 2025 new (non-year long) courses:
1L Spring 2025 Booklist