From the outside, the intense, hyper-commercial culture inside financial firms seems both fascinating and appalling, leading to works like The Wolf of Wall Street. What's it like from the inside, especially if you'd already tried to step away from it, to try to find a new kind of balance? In her new memoir, Private Equity, Carrie Sun details how she dived back into the belly of the beast, as personal assistant to the billionaire founder of one of the hottest investment firms in New York and found herself slowly starting to disappear.