Finished reading A Sundial in a Grave by Mary Gentle a couple days ago. This is a historical fantasy novel and was a fun read, I really enjoyed it. Full of adventure, intrigue, and plot twists, I became quite immersed into the story. Though using number theory to predict the future is a pivotal element in the story — and thus making it a fantasy story to many — I disagree given that predicting the future would have been (as it is now) part of the culture of the time. There are also incursions into Rosicrucianism — though these occur later in the novel. But really the novel’s enjoyment, for…