Zoltan Barbu is a once-exalted author now exiled in Los Angles. He wears capes, seduces actresses in Jacuzzis and hasn't produced anything in decades. If it sounds cliche, that is the point. In Ménage, her first novel in 25 years, the feminist writer Alix Kates Shulman has given us a modern parable: caricatured characters interacting and standing in for real-world archetypes. Zoltan, predictably enough, is her catalyst.