However, what if I scan my copy and put it on the internet? Can someone else now take those scans, digitally clean them, and reproduce the book for commercial purposes or those beyond fair use? This is a question I'd love answered, but I'll leave it for a time when I've run out of my own materials to reproduce. Meanwhile, below are some links about copyright that might be of interest if you want to reproduce things, too. And if you have any insight on this topic, please leave a comment!
http://baylyblog.com/blog/2006/02/christian-businesses-make-copyright-claims-without-legal-merit
http://fairuse.stanford.edu/2009/07/30/turning_outofcopyright_books_i/