Recently: The Gimp by Christopher Nosnibor and So You've Been Publicly Shamed by Jon Ronson. Both pretty good.
Currently halfway through the incredible The Visceral Tear by Sue Fox (Oneiros). Intense and genuinely transgressive tome which is an ode to her lifelong masturbatory habits, obsessions with sex offenders and being forced, disappointments with weak men. Honest portrayal of how dangerous female sexuality can get, stream of consciousness prose clearly written while wanking, many contradictions and mysteries. Loving this.