DAVID SHEFF is the author of several books, including the #1 New York Times best-selling memoir Beautiful Boy. His writing has appeared in the New York Times, the New York Times Magazine, Rolling Stone, Playboy, Wired, and many other publications. His ongoing research and reporting on the science of addiction earned him a place on Time magazine's list of the World's Most Influential People. Sheff and his family live in the San Francisco Bay Area. Visit David at DavidSheff.com, and on Twitter @david_sheff.