The professors I respected most were those that said either "none of the course materials will be taken directly from the book" or "there will be no book for this class, here are a number of texts that are good, get a used copy from Amazon."
PS: For anyone in undergrad, #1 question when you start a semester -- email professors and ask if the text is required, and if so, whether a previous version can be used. (I know publishers are getting worse and worse about one-time-use codes and "enhanced offerings" though)