Read This! Etiquette & Espionage by Gail Carriger
Sophronia is a trial to her family, always up to some mischief or another. Her mother has made the decision to send her off to finishing school but all is not as it seems. The quote from the cover says it all: "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." Etiguette & Espionage is filled with lots of non-stop action and good snarky dialogue.