Although I am an avid fan of Mark's modern-day based fantasy (Age of Misrule etc), I had my doubts about a book based in historical times. Probably due to my failure to engage with the historical fiction of Philippa Gregory etc. And at first, you could well be reading one of those novels. Expect much better written; the detail is absolutely brilliant, I swear Chadbourn must have a time machine - it really feels like you're a part of 1500s. I feel like I know the characters as if they were old friends, and the world they inhabit as if it were my own back garden. And then, of course, something happens, and you remember you picked up this book in the fantasy section, and all is not in line with the history you learnt at school.
Chadbourn weaves a perfect blend of fantasy and reality, blurring the borders between the two. Swyfte is a likeable hero, and you find yourself strongly rooting for him from the get-go.
The ending to the main plot is somewhat predictable (we all know that the Spanish Armada failed, for example), however Chadbourn always likes to leave a curveball at the end, and this one leaves you reeling, and will have you gagging for the next book in the timeline as soon as possible.
Thoroughly recommended, even if you've never read any of Chadbourn's other works, or indeed any historical fantasy before; here, it works, and it will have you hooked.