I'm interested in writing a historical fiction + science fiction novel but I'm hung up on being 100% historically accurate. The necessary information to be accurate is hard to find and to validate. The era I'm interested in is 18th Century France, dealing with aristocracy with things like their way of life, daily customs and routines, technologies and occupations, salaries, where aristocracy got their money from, what the extent of their income is, and things like that. While yes it is a fiction I think the era lends itself to social and technological restrictions which mold the characters into who they are and what they do. It's important to me to draw contrasts of characters and society to ours today. I have a general sense of this era but another obstacle is writing in accurate dialogue. Obviously we don't talk the same as they did back in the day so I'd like to get a feel for what speech was like then. So I'm wondering if there are good resources for helping with this kind of writing. Are there good examples of historical fiction books that reference this specific era? Anything helps. Thanks in advance for the help!