Although the Library does not purchase copies of textbooks for checkout, your instructor may have provided a copy of the textbook to the Library to place on reserve.
Items that are placed on reserve are held at the main Library desk. Unlike other items in the Library, items that are placed on reserve often have shorter checkout periods such as hours or days instead of weeks. These shorter windows exist to ensure that many people in a course can have access to the same materials.
You can use Search library catalog in the right column under Related Resources to find out what items are available at the Library. In the library catalog, you can use the Course Reserves option toward the top of the screen to look up items that are on reserve based on instructor or course.
Items are arranged in reserve by your instructor's name and the title of the item, so please have these two details ready when asking for reserve items at the desk.
In addition to reserves, some textbooks are available at Learning Enhancement and some science and math textbooks are available at the NASA Center.