... because there is only one book to buy. All the other required readings, podcasts, videocasts etc. are online.
Be prepared for some print readings to be announced, possibly, later, and there may be a small cost for those.
The book ordered to the bookstore is: "The Quest for Meaning: Developing a Philosophy of Pluralism" by Tariq Ramadan. This may not be in when classes start. You will be advised when it arrives.