What is the author's style in Beneath a Marble Sky: A Novel of the Taj Mahal by John Shors?

The author's word choice tends to be on the formal side, as befits an educated princess who is telling the story as an old woman, even during the scenes of her childhood. Jahanara's voice grows stronger or weaker depending on her situation, and when she glosses over time through various events, her voice takes on a vague distance.