To find books written about a specific play, do aSubject searchin OSCAR (the library's catalog) and type the name of the playwright (last name first). For example, to find books about the plays of August Wilson, type "Wilson, August."
If you are looking for books about a more general topic, do anAdvanced searchin OSCAR. If the first terms you type do not give you the results you want, try typing in various ways of describing your topic. Then, once you find some books that look like what you want, click on the Subject links that appear in the full records for those books, and you will probably find even more books on the same topic. (For example, if you type "Broadway musicals," you will find a few books about them. However, if you click on the link for the subject heading "Musicals -- History and criticism -- New York (State) -- New York," you will find even more.)
Your results will probably include printed books that can be found in the library building, as well as electronic books that can be read online. You can tell which books are printed books because a location in the building is indicated as part of its record in OSCAR. E-books have no physical location indicated, and the words "(Electronic Resource)" usually appear immediately following the title of the book. Click on the title of the book to open its record in OSCAR; then click the link in the middle of the screen to read the book online.