I'm sure I'll write about many YA books for adults in the future, but today I will focus on a few historical fiction books.
Fever, 1793 by Laurie Halse Anderson. I'm sure you knew our fledgling nation's capitol was in Philadelphia in 1793. Did you also know a yellow fever epidemic claimed around a fifth of the residents? There would have been more if many hadn't fled the city, including George Washington. Protagonist Mattie Cook falls ill despite fleeing, but survives to return to the devastated city.
The Land by Mildred D Taylor. The son of a white landowner and a former slave, Paul Logan is openly acknowledged by his father in post Civil War Georgia. Paul works hard to acquire land of his own. Needless to say, he faces many obstacles. The author draws upon true family stories for her well-crafted books on the Logan family.