NYT has an article on the fears of the book industry about e-book piracy. There are numerous parallels to the music industry, including that the business model is under pressure even without piracy. The music industry remains dismal.
Since music sales peaked in 1999, the value of the industry’s inflation-adjusted sales in the United States, even including sales from Apple’s highly successful iTunes Music Store, has dropped by more than half, according to the Recording Industry Association of America.