First look for it in the USMAI catalog to see if St. Mary's has it.
If St. Mary's doesn't have it but other USMAI libraries do, just click on the yellow 'request' button and follow the steps to order it. The software decides which library to request it from. This is the fastest way to get a specific book sent to you.
If you need a specific book and it's not available in the USMAI catalog, then use the ILLiad system to request it. We'll get it for you from a library outside of the USMAI system.