University of Delaware faculty, staff, and students can use Interlibrary Loan (ILL) to request items from other libraries. Note that you must create an ILL account before you place your first request.
Average delivery time for articles is 2-3 days and for books, DVDs, and other loans is 10 days.
Some searching tips:
Books are shelved in the Library with a Library of Congress (LC) call number; see the UD Library's Call Numbers tutorial for help interpreting the call numbers you discover in DELCAT Discovery.
If an item's location is the Library Annex, you can place an online request for those items, which will be retrieved and held for you at the Morris Library Help Center.