Anyone wanting to seriously study Henry VIII will need to read this book. I think that it takes a number of books to get an idea of "Great Harry's" life, but this has unique information. I believe that Scarisbrick was the first historian permitted to use the Vatican archives to research Henry's annulment/divorce. Scarisbrick, for example, analyzes the divorce/annulment of Henry and Catharine of Aragon in careful details, and comes to a somewhat surprising conclusion. Also very carefully examined are the course of the Henrician church, and Henry's ever-shifting foreign policy.
I have one small comment. Scarisbrick expresses surprise that Henry persisted in using the somewhat eccentric argument from Leviticus. I think the reason is clear: Henry wanted something that could not be resolved by dispensation. As Retha Warnicke says in The Rise and Fall of Anne Boleyn: Family Politics at the Court of Henry VIII (Canto): "[...] Cardinal [Wolsey] [...] could and did find better reasons than Henry's for ending his marriage, but his arguments (like those of other scholars) can all be characterized as legal technicalities that are by their nature subject to retroactive dispensation. In contrast, Henry's reasoning is straightforward: the pope could not dispense from Biblical law [...]." This cavil does not diminish Scarisbrick's achievement.