New e-book readers are hitting the market. But “if the e-book is going to be a hit, a few things have to happen. First there has to be a good selection of material to read, and, for publishers, that means taking the risk that their best titles may wind up being distributed for free on the Internet. The recording industry has struggled with this problem in ways both overt and subtle: It has sued batches of pirate downloaders but also circulated its own falsely labeled music files intended to frustrate and dissuade would-be pirates.”