How Publishing Really Works: From an Indie WriterÃ¢€™s Point-of-View | John Ellsworth | Official Author Website
This is a good read and I hope will generate some discussions.
This is a good example of niche marketing done well.
I wonder if anyone comes close to doing this in the fantasy genre. I think it would be hard to find a formula in fantasy that's as easy to write and as effective with an audience.