I would advice this short book for all those interested in a copyright
debate.
http://mises.org/document/3582
Although the book is called "Against IP", the first part gives a very
thorough and fair overview
of both sides. The arguments there are much deeper than the usual "artists
will starve
and we will have no music".
Also, I've written a little bit on the matter, plus I have a nice link
collection:
http://www.louigiverona.ru/?page=projects&s=writings&t=philosophy
Louigi.