'A Ripleyesque exploration of female insecurity set among the socialites of Manhattan' Guardian, Books of the Year'An irresistible novel about a toxic friendship taken to the extreme' ElleLouise is struggling to survive in New York; juggling a series of poorly paid jobs, renting a shabby flat, being catcalled by her creepy neighbour, she dreams of being a writer. And then one day she meets Lavinia. Lavinia who has everything - looks, money, clothes, friends, an amazing apartment.Lavinia invites Louise into her charmed circle, takes her to the best underground speakeasies, the opera, shares her clothes, her drugs, her Uber account. Louise knows that this can't last for ever, but just how far is she prepared to go to have this life? Or rather, to have Lavinia's life?