I have finished book one of this...and honestly, the ONLY similarity I see at all to Twilight is the obsession between Christian & Ana. But, at the same time, it has a different quality to it than that. I am currently 25% into book 2.

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“Sex is one of the most personal things we do as people. To have someone who says she loves you limit how you express yourself in the bedroom is like a small death. It kills the soul.” --Anita Blake to Jason Schuyler in "Blood Noir" by Laurell K. Hamilton