2 books · Ages 4–13 · Chapter Books
The Royal Diaries is a 2-book series for ages 4–13 by Kristiana Gregory. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, Cleopatra VII: Daughter of the Nile and Marie Antoinette: Princess of Versailles are great first picks.
No particular order needed — browse and pick what catches your eye.