What is the author's style in The Six Wives of Henry VIII by Alison Weir?

For the most part, The Six Wives is structured chronologically, anchored by its focus on Henry's six wives—the narrative begins with the birth of Henry's first queen (Katherine of Aragon), and ends with the death of his last surviving queen (Anne of Cleves). Parts One and Two, approximately two thirds of the book's narrative pages, focus on Henry's first three wives (Katherine of Aragon, Anne Boleyn, and Jane Seymour). This seems to be because most of the important activity of Henry's reign (the birth of his children, his divorce, the creation of the Church of England, his military conquests) took place in that phase of his life. Part Three focuses on his last three wives (Anne of Cleves, Katherine Howard, and Katherine Parr). While there is the sense that these wives are somewhat narratively short-changed, the fact remains that they passed through Henry's life for much shorter periods of time than his first three wives and, for the most part, had much less personal and/or political impact on that life.