Considering that a lot of classic fantasy genre tropes come from this period and region of history, perhaps that is a bit of an oversight on my part, one that reading Iggulden's Wars of the Roses series has helped me address. In fact, reading these books, combined with some thinking I've been doing recently about plotting, has led me to some interesting reflections. So while this is still a review of the series, I also want to talk a little about those thoughts.
If I were reviewing this is a fantasy book, I would critique is for being repetitive. After all, this is book four in which Lancaster and York fight, kings get captures, kings get killed, people don't have heirs at the appropriate times, and battles are fought over the exact same thing that they were waged a few years ago. However, if this is not a fantasy novel, so I can't blame Iggulden if Ravenspur started to feel repetitive in places. This is, after all, what really happened, or at least the broad strokes are. For some thirty years, the houses of York and Lancaster fought back and forth over the throne of England, and devastated the population in the process.
As I was reading this book, I was wrestling with a confusion that had nothing to do with its contents, and which I should seek to clarify. This book, sold in the US as Margaret of Anjou, is the same book as Trinity, the title under which it is sold in the UK. And now that we have that exceedingly minor point of confusion cleared up, we can get on with the rest of the review.
What is the modern fantasy genre may arguably be said to have been derived from historical fiction. After all, much of classical fantasy was derived from the myths and legends of times gone by, and for a long time (arguably to this day), fantasy was significantly stuck in twelfth century Europe. The genre has since expanded far beyond those historical beginnings, with subgenres like alternative world fantasy that are set in completely different universes, with their own laws of physics, and with characters that sometimes aren't human at all. However, given that heritage, it perhaps should not be terribly surprising that a historical fiction novel about the Wars of the Roses would read more like fantasy than anything else.