How well do you really know your best friend? Kat Grant and Alice Campbell have a friendship forged in shared confidences and long lunches lubricated by expensive wine. Though they're very different women--the artsy socialite and the struggling suburbanite--they're each other's rocks. But even rocks crumble under pressure. Like when Kat's financier husband, Howard, plunges to his death from the second-floor balcony of their...