They're likely to have something like a book review with an image, and they would ask you how the image and text work together to convey an aspect of discovery.
i would reccommend reading books, but it might be a little too late.
Try this link: http://discoveryhshs.weebly.com/uploads/1/3/2/5/13254685/discovery_unseen_texts_booklet_-_fiction_and_non_fiction.pdf
its a list of unseen texts that are all fiction-non fiction shorts.