Vampires vs Werewolves : Etiquette and Espionage, Gail Carriger
Well this was exactly what I was expecting. Posh frocks, tea and cakes, exquisite manners, and a school for evil geniuses. Sadly, girls aren't allowed to attend the school for evil geniuses (boo) but a finishing school in a dirigible is a pretty cool alternative.
As for the vampires and werewolves; the vampires are dedicated followers of fashion, and the werewolves are extremely good in a fight. And they'd all run rings round the Twighlight crowd.
Verdict: a whole lot of fun, and rather like eating too much cotton candy.