I don't have enough information to say exactly who Tara Reade is in these stories. She could be an ordinary person with an interesting story, or she might be a public figure in a specific community.
A beverly graphic novel could be about various things. It might be about the adventures of a character named Beverly. It could tell a story of Beverly's life, her dreams, her relationships, or her struggles. Maybe it's set in a fictional world where Beverly has some special powers or a unique mission.
I'm not aware of any legitimate 'Beverly Marsh sex novels'. Beverly Marsh is a character from Stephen King's 'It', and the main focus of the original works is horror, not sexual content.
Beverly has a crucial part in the IT novel. She not only battles the evil but also has important relationships with the other characters that drive the plot forward.