Without further details, there are numerous possibilities. It could be a story about a particular mission she was on where she learned an important lesson. It might involve her encounters with other Bajoran characters, like the Vedek Assembly members. She could be telling Sisko about a time when she had to make a tough decision regarding the future of Bajor, and how she weighed the different options. It could also be a simple, heart - warming story about the beauty of Bajoran culture that she wants to share with Sisko.
There's also a possibility that Jake is just an ordinary person in the fanfiction world who has been given this extraordinary ability to imprint. This could make his character development really interesting as he has to deal with the consequences of this sudden and powerful connection to the reader. He might struggle with understanding his new feelings and how to act on them in a world that may not be used to such a thing.
In terms of his self - esteem, it could take a hit. He might start to question himself and wonder what he did wrong. However, over time, if he focuses on self - improvement and moving forward, he can regain his confidence and build a new life for himself, whether that's alone or with someone new in the future.
I haven't come across any reports stating that Jake Tapper is penning a novel. His focus seems to be on his journalistic endeavors, such as reporting the news, conducting interviews, and providing analysis. However, it's not impossible for him to venture into novel - writing in the future, but for now, there's no indication of it.