Kari SutherlandTui T. Sutherland and Kari Sutherland are sisters and best friends. They grew up in South America, traveling a lot and moving several times (and they're still only about 80 percent certain that their parents weren't secret agents). Karinow lives in New Jersey, while Tui lives in Boston, but they use every excuse they can to see each other (like, say, writing a book together). Read More Read Less