While I know I can't stop anyone from doing it, I would like to note the stipulation on the free PDF version of the book on the navbar. This free PDF is intended for personal use only and is not intended for use by large groups or organizations.
If multiple people will be using the book, e.g. for a class, I ask that the organization or group please purchase individual copies. If you would like multiple PDF files, please use the Smashwords link.