Sutherland, Tui T.

Tui T. Sutherland & Kari Sutherland are sisters and best friends, and if you can t tell by looking at them which one is older, Tui certainly isn t going to tell you. 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). Kari now lives in California, while Tui lives in Boston, but they use every excuse they can to see each other (like, say, writing a book together).