In his bestselling memoir Tweak, Nic Sheff took readers on an emotionally gripping roller-coaster ride through his days as an addict. Now in this powerful follow-up about his continued efforts to stay clean, Nic writes candidly about eye-opening stays at rehab centers, devastating relapses, and hard-won realizations about what it means to be a young person living with addiction. Tweak and Beautiful Boy, his father's memoir about him, are the basis of the upcoming film Beautiful Boy, starring Steve Carell and Timothée Chalamet.