Sex (Goddess) and Murder Mysteries
Sex certainly sells. To a certain niche market, I grant you that, but it sells. Combine it with another market, that of murder mysteries, add some innovative marketing (in this case, publishing via email) and you get "The Daughters of Freya".
The premise is simple: a cult worshipping Freya, the Norse goddess of sex, is giving away sex as a means to get rid of all the negative energy in the world. Enter a journalist who is trying to save a friend's daughter swallowed up by the cult, solve a murder, save her own marriage and be there for numorous family crises.
I don't know how good the book is, because I'm forced to read it in drips and drabs: the publisher sends daily emails (about 3-5) in which the story unfolds. This creates natural cliffhangers, not to mention frustration when you want to page over, but can't. The style is typical email style, with no elaborations or descriptions, with the typical shortcuts and typos. All very realistic.
And I can't wait for my next instalment.