All These Things I've Done, by Gabrielle Zevin

Fantastic dark futuristic dystopian  YA. Mafiya heiress Anya just wantes to go on living with her grandmother and older brother, who suffered brain damage as a child, but a Romeo and Juliet style teenage romance propells a sequence of events reminiscent of the Godfather- she has to step into shoes she never wanted to fill. Clever twists on the dystopian future included museums functioning as nightclubs (Little Egypt), prohibitions on chocolate and coffee, and a lot of government censorship. Really well done.