Book suggestions similar to “The Second Mrs. Astor”

I like the style of this book, like reading Downton Abbey and learning little bits of history, finding interesting things to double check and see which parts are history and which is fiction.

I like how well researched it was and how a lot of the details were facts and actually happened, but presented from a fictional perspective of a real person.

I like section of history too, a romance about a Titanic survivor. I’m not interested in war historical fictions.