I bought this on Amazon (12.26.12), so it doesn't seem to be banned anymore.
There's dub-con and a bit of captor-prisoner conflict, a bit of caning, and a quite nice fisting scene,
but this isn't really a dark story at all.
At just over 400 kindle locations it's really not much more a vignette, but a pretty a pretty smexy one, more than worth the $.99 price. :)