Black Horses for the King: An Epic YA Historical Fantasy About the Young Man Who Built King Arthur's Cavalry (Magic Carpet Books)

Galwyn, the son of a bankrupt and dishonored aristocrat, has always had an ear for languages. So when Lord Artos—later known as King Arthur—needs an interpreter to help him buy large horses to breed a troop strong enough to carry armed warriors against the Saxon invaders, Galwyn gets a chance to redeem his father’s honor and make a name for himself.