Some great advice here I think. Just to add to the chorus, I love the story of Hidalgo and would very much enjoy reading more about it in a fictionalized context.
I suspect you're wrong when you say it isn't central to the story - it sounds to me like it is a strong motivating factor in your MCs actions. Understanding her own emotional motivations is really important in my opinion. Plus, people just love to feel like they are learning real stuff while the read great books.
The hard part is just incorporating it so that it isn't too info dumpy. Think you've gotten great advice here on how to try.
To be fair I'm a total history nerd, but based on your description alone I would definitely check out your book.
I suspect you're wrong when you say it isn't central to the story - it sounds to me like it is a strong motivating factor in your MCs actions. Understanding her own emotional motivations is really important in my opinion. Plus, people just love to feel like they are learning real stuff while the read great books.
The hard part is just incorporating it so that it isn't too info dumpy. Think you've gotten great advice here on how to try.
To be fair I'm a total history nerd, but based on your description alone I would definitely check out your book.