I reviewed this months ago, but it certainly doesn't need my help as it is doing great all on its own. Day manages to blend a erotic love story with themes of abuse in a way that brings the issue up without bringing the story down:
Penguin does some clever marketing:
http://youtu.be/xM1ksdKjW0c
Sylvia released this herself. She has experienced some great success with this and other series. Good Job Sylvia!
http://youtu.be/TuOn55BdxVM