Well, Wetlands, by Charlotte Roche, most recently.
But Lucky, by Jackie Collins, was the lone book in my grandmother's den and I'm sure she still wonders why I always locked myself in there (around age 12) for long periods of time. Ahem. GREAT DIRTY READ, at least in my teenage mind. Also, sidebar, the book was turned into a FABULOUS mini-series called "Lucky/Chances" starring Nicolette Sheridan. My other grandmother and I watched it together and she always fast-forwarded through the sex scenes.
Also, V.C. Andrews was and always will be my most favorite dirty book author. However, I do not like these new V.C. ghostwriters — I like the V.C. from the '80s, particularly the Casteel family series (Heaven, etc.). I still read them during the summer on the beach. They're out of print, but I collect them. Anyway, it's sex, it's rape, it's incest, it's all the smutty s**t you can imagine!
Images from Amazon.com