Heart's War — Kathryn Loch

Book 2 in the Heart and Soul Series Brynmor and Rose have known each other for years. Since his rescue of her eighteen years ago, Rose has come to know a gallant man and a skilled knight. But also one who is plagued with doubt. Born a son of a freeman farmer, the Fates have worked to place him in control of the vast principality of Powys in Wales. But as Wales falls pell mell into a war for independence, Brynmor must choose. Will he support his Welsh brethren as his heart desires or will he side with the brutal English king, Longshanks? Rose understands if the king cannot trust Brynmor's allegiance, he will destroy Powys. She knows of only one way to guarantee an alliance but will Brynmor agree to it and defy his Welsh blood?