"Rob-Roy" by Walter Scott is a historical novel published in 1817. When Frank Osbaldistone refuses to join his father's business, he's sent to live with his uncle's family near the Scottish border. There his cunning cousin Rashleigh betrays the family, stealing vital documents that threaten their honor and fortune. Frank pursues him into the turbulent Scottish Highlands on the eve of the 1715 Jacobite Rising, where he encounters the legendary outlaw Rob Roy MacGregor and falls for the spirited Diana Vernon amid dangerous political intrigue.
Wikipedia page about this book: en.wikipedia.org/wiki/Rob_Roy_(novel))