That's Tristan Taurmino she has a couple of books. I've mentioned one of them "The Ultimate Guide to Anal Sex for Women" a few times. She just came out with a revised edition in the past few months. She also just in the past month started her own message board.

http://www.puckerup.com/bboard/index.php

Her website is:

http://www.puckerup.com/

She is one of my celebrity crushes. I'm in lust with her.