In the book that nicole is reading, the writer makes a forceful contrast between expectations and reality, creating a surprise ending. which literary device is the author using? irony hyperbole allegory understatement

The correct answer for the question that is being presented above is this one: "irony." The literary device that the author used is irony. As irony is "a state of affairs or an event that seems deliberately contrary to what one expects" (part of official diction) and the others don't quite fit that description.