{Trailer Sunday} Etiquette & Espionage by Gail Carriger

It's one thing to learn to curtsy properly. It's quite another to learn to curtsy and throw a knife at the same time. Welcome to finishing school. 

 Fourteen-year-old Sophronia is the bane of her mother's existence. 

Sophronia is more interested in dismantling clocks and climbing trees than proper etiquette at tea--and god forbid anyone see her atrocious curtsy. Mrs. Temminnick is desperate for her daughter to become a proper lady. She enrolls Sophronia in Mademoiselle Geraldine's Finishing Academy for Young Ladies of Quality.

But little do Sophronia or her mother know that this is a school where ingenious young girls learn to finish, all right--but it's a different kind of finishing. Mademoiselle Geraldine's certainly trains young ladies in the finer arts of dance, dress, and etiquette, but also in the other kinds of finishing: the fine arts of death, diversion, deceit, espionage, and the modern weaponries. Sophronia and her friends are going to have a rousing first year at school. 

 First in a four book YA series set 25 years before the Parasol Protectorate but in the same universe.