There isn't an abstract, so here's part of the beginning:
A. A named, recognizable plot device or feature that raises expectations about the direction of the plot or character interactions.
B. A tag that references a recognizable plot device and serves as a keyword for reviewing, promoting, and cataloguing books. Such tags can be incorporated into a book’s paratext to draw readers by evoking anticipatory pleasure or steer them away from plot devices they dislike.
There isn't an abstract, so here's part of the beginning: