Regency Tales Series by Ari Thatcher

Desperate for adventure, Lady Agnes Wentworth drags her sister Lady Matilda off to the wilds of Scotland. There she discovers a mysterious, cold, starving man, just the sort of thing to occupy her attention. He’s handsome, kind, and as big as a bear, but her family warns her to have nothing to do with him. Ewan, Lord Ravenscliffe, escaped his wicked uncle, and once he regains his strength, he’ll return to save his brother. Only then can he take back what is rightfully his.