However, the library does have materials put on course reserve by professors. Look up Course Reserves by course or professor here.
From the library's Collection Development Policy:
Due to the high cost of textbooks and their accelerated publishing schedule, purchasing traditional textbooks for the collection is unsustainable for the library in terms of funds and/or of the available space. Note that this exclusion does not apply to non-traditional textbooks used as class texts: the library will order novels, ethnographies, case studies or any other materials that will add lasting value to the library’s collection. The library will also consider purchasing unlimited e-access to required texts when available through its e-book providers, if funds are available.