Marie Antoinette, serial killer - Katie Alender

Paris, France: a city of fashion, chocolate croissants and cute boys.
Colette Iselin is thrilled be there for the first time, on her
class trip.
But a series of gruesome murders are taking place around the city,
putting everyone on edge. And as she tours the sights, Colette
keeps seeing a strange vision: a pale woman in a ball gown and powdered
wig, who looks like Marie Antoinette.
Colette knows her status-obsessed friends won't believe her, so she
seeks out the help of a charming French boy. Together, they discover
that the murder victims are all descendants of people who
ultimately brought about Marie Antoinette's beheading. The queen's
ghost has been awakened, and now she's wreaking her bloodthirsty
revenge.
And Colette may just be one of those descendants . . . which means
she might not make it out of this trip alive.