I second what alphabetika said.
Based on my attempt to listen to the audiobook, which I couldn’t get through due to sexual content, and my mom’s references to how explicit the book series is.
You can find other material to teach about the Jacobites, the fight to get the Catholic king on the throne of a United England and Scotland, and the crackdown by England on the Scottish clan system, culminated in the horrific Battle if Culloden (?).
Off the top of my head, Henty has a book about the Jacobite rebellion.
It’s also featured prominently in Wilberforce’s fight in the parliament; the movie Amazing Grace has it in there.
There’s Scotland’s Story from Yesterday’s Classics, but I don’t know the age level.