I'm a bit torn about this book. On the one hand, I learned some interesting new information about the various families involved in the Wars of the Roses and the backdrop to some of the key events. On the other hand, I was frustrated by Bicheno's tendency to accept or dismiss explanations and theories with minimal discussion of their merits or flaws. For example, he accepts wholeheartedly the idea that Edward IV was illegitimate. This may be true (I have read other more convincing arguments for this), but Bicheno's discussion of the evidence is too limited to be entirely convincing, especially given that he goes on to refer to Edward's illegitimacy as accepted fact later in the book. He also makes assumptions about the relationship between Richard, Duke of York, and his wife Cecily Neville, for example in his discussion of York's flight from an enemy army at Ludlow with his eldest sons while Cecily and the younger children stayed behind to face the army. Bicheno says this "was not an action any wife or child was ever likely to forgive," even though other sources I have read suggest that this plan of action was a joint decision. At various other points in the book, Bicheno makes controversial claims or discards traditional explanations without sufficient discussion of his reasoning.
Even though I am very familiar with the history of the Wars of the Roses, I found the structure of the book somewhat hard to follow because of its shifting, non-linear chronology. An event would be discussed in relation to a particular family in one chapter, only to reappear later without explanatory detail, forcing me to flip back through the book to remind myself of what the issue was all about. Despite my previous familiarity with the topic, I found it hard to keep track of some of the minor characters who cropped up at intervals. The list of key people included at the beginning was helpful, but only to a degree and not without flaws. For example, Henry Stafford is correctly listed as the younger son of the 1st Duke of Buckingham and the second husband of Margaret Beaufort, daughter of John, but the dates of his life listed are those of his nephew, another Henry Stafford, grandson and successor of the first duke.
The frequent repetition of names during this period would complicate the life of any historian, and Bicheno doesn't always make it easy to distinguish between identically named people. One example is the name John Neville, which is borne both by a key Yorkist (brother of the Earl of Warwick and cousin of Edward IV) and by their relative, a notable battle commander on the Lancastrian side. The Yorkist John Neville is captured at the second battle of St. Albans, but when he is released, Bicheno suddenly refers to him as Montagu, without explanation. I happened to know that John Neville was created Lord Montagu, but not all readers would be aware of this fact, so for Bicheno to suddenly mention the release of Montagu, a name he has not mentioned before, is confusing. The title of Lord Montagu was bestowed on John Neville before the second battle of St. Albans, so why not mention this elevation earlier in the book and avoid unnecessary confusion?
I liked the many included maps and tables of the peerage/church leadership of the time, but the family trees were a source of frustration due to errors. Several individuals are misplaced or incorrectly described in the family trees where they appear. For example, in Appendix D, where Bicheno discusses the Beauchamp inheritance, the two Anne Beauchamps are reversed, with the aunt listed as the 15th Countess of Warwick and her short-lived niece listed as the "16th Countess of Warwick by right following the death of her namesake niece." Eleanor and Elizabeth Talbot are listed as daughters of John Talbot, 1st Viscount Lisle (son of the 1st Earl of Shrewsbury, another John Talbot), when instead they were his sisters. In the Neville family tree, Joan Neville's husband, William FitzAlan, is incorrectly named as the 1st Duke of Warwick. That title is also—correctly—listed in the same family tree for Henry Beauchamp, married to Joan's sister Cecily. William FitzAlan was actually the 16th Earl of Arundel and did not die in 1446, as listed, but rather in 1487. These errors about historical people with whom I was familiar makes me question the correctness of the information about people unfamiliar to me.
Bicheno also made a couple of references to "Game of Thrones" that I found jarring. Yes, George RR Martin based his pseudo-medieval fantasy series on the Wars of the Roses, but Bicheno is writing about actual history, which doesn't need the fictional references—however minor—to be compelling. The acknowledgements at the end of "Battle Royal" make it clear that it was "Game of Thrones" that sparked Bicheno's interest in the Wars of the Roses, so apparently he couldn't resist throwing in a couple of quick references.
Finally, the index for the book was lacking. Several noteworthy people were not listed at all, while for others, several pages on which they appeared were not listed (making it hard to go back to reread previous references). At least in one case, two people with the same name were conflated into a single listing: the index listing for Cecily Neville, Duchess of York, includes not only the pages on which she appears, but also references to her namesake niece, who married Henry Beauchamp, Earl (later Duke) of Warwick, and died young.
All of this may sound nitpicky, but taken as a whole, these issues marred my enjoyment of what would otherwise have been an interesting way of telling the history of the Wars of the Roses. I did enjoy the book, but not as much as I would have without its flaws. I'm still undecided as to whether I'll read the second volume, "Blood Royal."