I struggle with this. I've been saying YA dystopian, but not sure if I should also say it is sci-fi, action, suspense, or political thriller?
Super fast summary of the plot: The government in Mathilda's country Calapena is overthrown by the lower class. Her uncle and father are in politics and her mother an academic, so all of them are targeted by the new government and end up in prison. Mathilda first escapes to a neighbouring country and then returns to rescue her family members.
The story is set on earth in what is the not-so-distant future and there are some references to new technologies, surveillence, changes to world governments. There is a war, a missing Prince, refugees, and a plague too.