When you go to the student portal, click academics then 'your class schedule.' Then click the current semester and when you click each class, it tells you the book title, edition, publication date, and ISBN at the bottom. For a lot of them, the publication date does not match the edition/there is no textbook available online for the publication date the college wants. So for example, one of my textbooks asks for a 2014 publication date for a textbook. I can find the textbook, but the publication date online is for 2018 or 2017.
It will be too late for me to order the books on time if I wait until the first day of class to receive the book list.