Best-selling author of Tweak, staff writer for The Killing and the beautiful boy of his father David Sheff's best-selling book, Nic Sheff has written and spoken openly about his struggles with meth addiciton and where that took him: to homelessness, sex work, near arm amputation and, finally, a meth-induced psychosis that ultimately led him to sobriety. Here he talks to AfterPartyChat's Anna David about those experiences and they also discuss working together and their plan to speak at colleges about addiction and sobriety. Follow Nic on Twitter here.