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David Sheff is the author of the New York Times bestsellers Beautiful Boy and Clean: Overcoming Addiction and Ending America’s Greatest Tragedy. His writing has appeared in the New York Times, New York Times Magazine, Rolling Stone, 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.

Nic Sheff is the author of Tweak: Growing up on Methamphetamines, We All Fall Down: Living with Addiction, and Schizo. He is a contributor to TheFix.com and writes for television. His credits include 13 Reasons Why and Recovery Road. He lives in Beverly Hills. Visit Nic on Twitter @nic_sheff.

George Newbern has appeared in Father of the Bride, Father of the Bride II, Evening Star, Adventures in Babysitting, and many other films. On television, he has had roles on Scandal, Friends, Nip/Tuck, Hot in Cleveland, CSI, and more. He is also known for providing the voice of Superman in Justice League and for narrating audiobooks.

Graham Halstead, an Earphones Award and Audie Award–winning narrator, is a professionally trained actor and voice artist. As an actor, he has worked internationally in Edinburgh and London, as well as at the Kennedy Center in Washington, DC. His youthful, easy-flowing voice can be heard on television and radio voicing spots for Airborne and Allegra.