by "copied" you mean didn't buy it? because as far as writers go (the real ones), they don't care, the more people read it the better, right? or am I alone in this?
You're wrong. Professional writers rely on sales like any other working creative. The internet and advent of Kindles and other digital media devices is seeing the dead tree publishing business hit in the same ways as games, music and movies. Every time somebody steals the IP by downloading it (news to all the self-appointed legal eagles here = it's illegal, copyright theft is still an offence in most jurisdictions) then the writer loses their cut of the royalties from that book.
Most professional writers are on modest incomes, writing isn't a financial win button for many. So they are as affected by this issue as games developers or the music industry.
Obviously, I'm not speaking about the hippy-in-a-garret poet style writers or up-their-own-arses literary novelists who've already made a million and can afford not to care anymore.