Great beginning. It had me from the first line. But two to three hundred pages in, I realised I wasn't enjoying it half as much as I expected to, and it didn't recover enough from there. Not being familiar with the battle of Agincourt, I was surprised by the ending, but it wasn't a satisfying surprise. Seemed forced, despite being based on a real battle.
I wasn't planning to read the next book in the trilogy, but there's a mystery unanswered, so I checked reviews to see if I'd get an answer if I read the next one. Seems not only will I not get an answer, but even people who loved the first book didn't like the second very much, so I'm reading no further.

I found the first book rather boring, because it was too realistic - she was a soldier, so she was doing what she was told, with very little of her own goals & motivations. This changed in the second book, which was my favourite of the three.

Very good. Reminded me a bit of The Yellow Wallpaper, Anansi Boys, and something else I can't quite put my finger on. Maybe The Salt Roads? Something else though, I think.
After stupidly going to bed at four o'clock in the morning last night, I stayed awake till 7 reading this. Then I wouldn't get up in the morning until I nearly had it finished.