I'm so glad to know you enjoyed The Count of Monte Cristo!
Although it's been a long time since I read it, I agree it's very
exciting reading. So, here are three titles I'd like to recommend.
Fever, 1793 by Laurie Halse Anderson.
In 1793 Philadelphia, sixteen-year-old Matilda Cook, separated from her sick mother, learns about perseverance and self-reliance when she is forced to cope with the horrors of a yellow fever epidemic.