Black holes are not just a fresh and exciting topic. It represents the edge of human knowledge. Represents that human beings are not omnipotent. Not all knowing.
In my short fan science fiction novels about Star Trek, Although Captain Kirk often escapes death with his wit and also defeated the Greek god Apollo, when he encountered a black hole, he come to face his incompetence against it. He saw his team face excruciating pain. And was finally traumatized. The story is expected to be 100 pages long.