I'm not sure specifically who 'Tamar Judah' is without more context. There could be many people named Tamar, and the 'Judah' might be related to a family or place in the story. It could be a very specific narrative within a particular community, culture or even a family's own history.
The story of Judah Ben Hur is a mix of fact and fiction. Some parts might draw inspiration from real history, but much of it has been creatively crafted for entertainment purposes. We can't simply say it's completely true or false.
As I don't know the specific 'Tamar Judah story', I can't say for sure. But generally, a story's main plot could involve Tamar Judah facing some sort of conflict, like a struggle within the family, or a problem in the community. It might be about her achieving a goal, or learning an important life lesson.
The story is significant as it is part of the larger narrative of the Israelites. Judah was an important figure, and this story with Tamar reveals aspects of family relationships and the importance of upholding certain moral and social obligations. It also anticipates the coming Messiah as Judah was in the line of descent through which Jesus would come.
One main theme could be religious mystery. Since the Lion of Judah has religious connotations, the novels might explore secrets within religious texts or artifacts related to it.
Yes, there are. Some novels might be based on historical accounts of the Kings in Israel and Judah and then fictionalize certain aspects to make the story more engaging. For example, they could add fictional characters that interact with the kings or create fictional events within the framework of the known historical periods.