Jonathan Pentland might be an ordinary person who has had some unique experiences. Maybe he's a local hero in his town for some good deeds he has done. Or he could be an artist, a businessman, or someone involved in a particular project that has a story worth telling. Without more details, it's hard to say exactly what his real story is.
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.
Sorry, I still don't have enough information to tell a detailed story about Jonathan Pentland. He could be a completely unknown person to the general public or only known within a very small circle.
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.