Ahab’s Wife by Sena Jeter Naslund is an example of a book telling the same story as Moby Dick by Herman Melville, but from the perspective of a very minor character that is only alluded to in the book. The same can be done with poetry or in poetry. You can respond to another poem, or write a poem from another perspective in response to some other form of written work, such as a novel or short story.