He then relapsed once again and went into treatment. By the end of the memoir Sheff tells us that Nic has been sober one year. He hopes with all his heart that this will be the last time, and believes in him once again. But in his mind he knows that a relapse can easily happen again and that it will be very difficult for Nic, his family, and himself. Another theme throughout the memoir is Sheff wondering about how much he is to blame and what he could have done to prevent his son's addiction. Throughout the memoir Sheff attends numerous Al-Anon Meetings and therapy sessions. In these different sessions he is continually told of the three Cs: you did not cause it, you cannot control it, and you cannot cure it. Sheff has a difficult time accepting these statements throughout the memoir. At the end however, he says that he has come to accept two of the Cs, that he cannot control it, and he cannot cure it. He realizes that he has done everything he can do to try to help Nic, and knows that it is up to Nic to figure things out if he is to fully recover. "Beautiful Boy" became a critical and commercial success. It reached #1 on the "New York Times" Best Sellers List on April 6, 2008, and again on May 4, 2008. "Entertainment Weekly" named it the #1 Best Nonfiction Book of 2008 and it won the Barnes & Noble Discover Great New Writers Award for nonfiction in 2008. Amazon.com selected it as one of the "Best Books of 2008" and Starbucks picked it as one of the few books it would sell in its coffee shops. "Tweak: Growing Up on Methamphetamines" is a follow-up book and autobiographical memoir written by the son Nic Sheff personally about his own ordeal. It was published as hardcover by Atheneum Books for Young Readers in 336 pages in February 2008 () and later in paperback on January 6, 2009. It became a "New York Times" and "USA Today" bestselling memoir in its own right. Nic also wrote his follow-up book "We All Fall Down: Living with Addiction" in 2011. A film adaptation directed by Felix van Groeningen, and starring Steve Carell as David Sheff and Timothée Chalamet as Nic Sheff, was released on October 12, 2018, by Amazon Studios. It is based on both books "Beautiful Boy: A Father's Journey Through His Son's Addiction" by David Sheff and "Tweak: Growing Up on Methamphetamines" by Nic Sheff.