addiction is a painful secret many families are too ashamed to discuss.

In 2005, one father came forward in a very public way to share what it was like to love a child whose drug and alcohol abuse threatened to tear their family apart.

Award-winning journalist David Sheff wrote about his struggle to help his son Nic overcome a crystal meth addiction in The New York Times Magazine.

After the article was published, David says he realized he was not alone. His story generated an overwhelming response from other parents of addicts.

"When this hit our family, we were like so many families in this country," David says.

"I was not naive about drugs. I used drugs when I was a kid. … But I still thought, like most of us, 'This could never happen to our family.' When it did, we were so blindsided. We were so devastated that I realized that this is something we have to talk about."

David delves deeper into Nic's drug abuse and its impact on their family in his book Beautiful Boy.

"I realized the power of telling a story like this because it opens the door to other people," he says. "It gives people permission [to discuss it]."

Using journals he kept throughout his life, Nic has also written a version of the story.

In his memoir Tweak: Growing Up on Methamphetamines, he recounts his experiences as a teenage drug addict to the best of his recollection.

As a little boy, Nic seemed to have it all. David says his son had a winning personality and a golden, shining light about him. "He had this sort of joyfulness, this love of life," David says.

When Nic was 4 years old, his parents divorced. He grew up splitting his time between his father's home near San Francisco and his mother's home in Los Angeles.

For years, David says he thought Nic was handling the difficult situation well. "He was almost always on the honor roll," David says. "He was the captain of the water polo team."

Despite appearances, Nic says he felt so much pain inside he went searching for something to numb his emotions. When he was just 11 years old, Nic says he got drunk for the first time.

"The world was really abrasive and overwhelming, and I felt really hopeless," he says. "When I started drinking [alcohol], I couldn't stop."

One year later, David found marijuana in his son's backpack. Nic eased his father's fears by saying he'd made a mistake, but the truth was, he was secretly smoking pot every day by the time he was in middle school.

Continued on Oprah.com