“I’m not going to give you an itemized list of what I’ve done,” says Allie Rowbottom, when I, as politely as possible, attempt to ask her about her face — plump and tight and pretty, even in the unforgiving light of the cosmetics section at Saks. “What I will say is that some of what I’ve done has been really empowering. And some of it hasn’t been.” Rowbottom, 36, and I are walking around this heavily perfumed land of charge-card self-actualization — past a golden sign surrounded by white roses and orchids, advertising an upcoming “BOTOX Cosmetics Day” — discussing her new novel, Aesthetica, a tragic tale about clout-chasing your way off a cliff in the Instagram era, and, in a way, trying to find your authentic self again after faking highly filtered, brand-sponsored “authenticity” for so long.