The Rules of Seduction by Madeline Hunter
Nice cover, I think… still no blurb or info on author or publisher site. Out in Oct, I enjoyed the excerpt in the back of Lady of Sin.

hmmm there was this quote on Tanzey Talk – April edition:

Madeline Hunter is putting the finishing touches on her next novel, which is scheduled for publication November 2006. Titled RULES OF SEDUCTION, she’ll be leaving the world of The Seducer series and introducing a new group of characters. Madeline says, “Developing a new world has been exciting and a little frightening, with discoveries on every page as I write. At the center of this new world is an aristocratic family of tremendous wealth and success and a gentry family that’s barely surviving. The lives of these families are intertwined due to secrets, deceptions, friendships and honor.”