Well, without having read the 'Knights of the Golden Circle' novel, it could potentially be about a secret society of knights. Maybe they have some special mission or are protecting a certain ideology. It could be set in a historical context, with the knights facing various challenges and foes while trying to uphold their values.
Since I don't have a detailed knowledge of this book novel, it may tell the story of a group of knights in the 'Golden Circle'. They might be engaged in a fight against injustice. The story could explore their relationships with each other, their code of conduct, and how they navigate through different situations in their fictional world. It could also have elements of mystery and intrigue as they go about their tasks.