1356 by Bernard Cornwell. Its cheesey typical damsel in destress stuff set in a bloody french chevauchée, but I'll be damned if it aint a whole lof of fun. Think the expanse, but with horses as worse charachters.
I loved his Warlord Chronicles trilogy, and I'm onto reading the Sharpe series now. In terms of story he definitely has a formula that he sticks to, but it's a really entertaining formula so I can't really fault him for it.