Twilight was actually kind of revolutionary. Till that point urban fantasy romance really focused on adult women, and thus had enormous amounts of graphic sex,

Twilight was actually kind of revolutionary. Till that point urban fantasy romance really focused on adult women, and thus had enormous amounts of graphic sex, violence, and BDSM. Twilight was a story about a teenage Virgin, and a chaste vegetarian vampire. It was so safe reading even fundamentalist religious parents would let their kids enjoy it. So it found a huge, until then untapped market.