When I first read TWILIGHT, I got to the end, and there was a "teaser" chapter for NEW MOON. In those first pages, we learn how Bella and Edward's relationship progresses, and he and his family throw a birthday party for her. One of Edward's brothers goes feral when Bella gets a papercut, and, the next thing we know, she's fallen through a glass-topped table and is lying, bleeding, in a room filled with hungry vampires.
And then the pages run out.
I'm not sure where you live on the planet, but that cry of anguish you heard last February was me.
I HAD to get NEW MOON. Right that very moment. It could have been hailing toxic waste*, and I still would have driven to Borders.
* Which is pretty rare. When I was growing up in New Jersey, they only had to cancel school twice because of it.
So, teaser chapters work on me. How about for you? If you read and enjoyed a book, would a teaser chapter make you more likely to buy the sequel? Are there situations where you avoid reading the teaser?