Many, but not all, required textbooks are available in the library. Some are online; others may be only available as physical copies. To check if the library has a book, whether in ebook format or as a print book at your campus, use OneSearch on the library website.
If the book is required for a course and is only available in print in the library, the library will usually place the book on reserve. This means you can check out the book for 3 hours at a time.
If the book is available in ebook format, this means you can usually view the book anytime, view individual chapters, or print chapters. For more information on ebooks, see: https://library.thechicagoschool.edu/ebooks