Recently I discovered a book by Julian Fellowes, the creator of Downton Abbey. His book Belgravia is set a century before the Grantham family, so many of the themes of class are even more stringent.
Fellowes begins by noting that regardless of time period, similarities exist:
“Ambition, envy, rage, greed, kindness, selflessness, and above all, love have always been as powerful in motivating choices as they are today.”
For me, this book was completely engrossing. Like Downton Abbey, the plot moves around the themes quoted above plus new money vs. old money and upstairs (aristocracy) and the downstairs (their service help). Like in Downton Abbey, I loved most of the characters and hated a couple.