On the Media did an excellent show on this subject in April and re-broadcast this weekend.
How did J.K. Rowling stand up to Amazon?
Russian e-pirating of books - it creates free loaders, but it also widens an author's readership and may ultimately boost legal sales.
Listen to the podcast here:
Publishing: Adapt or Die - On The Media
It's their usual deep level of reporting - critical, with a somewhat bemused tone.