Use the large search box, Discover@MU, on the library homepage to search for articles on the liberal arts, humanities, and social sciences.
Use the same search box to look for books, but tick the box for "MU Books" to filter the results to just books.
The Chronicle of Higher Education (CHE) will be a great resource for researching questions about the three topics. The Library offers a subscription that you can access from anywhere. However, their search functionality stinks. Use a targeted Google search: site:.chronicle.com "liberal arts" to identify articles in the CHE. Copy and paste the headlines into the search box at CHE to find the full text. Alternatively, you can do the same in the Discover@MU search box.