When her son, David, went missing, Martha Wegner shared her anguish with the world.
David Wegner Hay, who had been struggling with addiction, had just graduated from a sober high school. But he went right back to drugs, and his family couldn't find him.
So Wegner, who had written a book about the miscarriage of her daughter, dealt with this crisis in the only way she knew how: writing.
Wegner started a blog and published a letter to David every day. Her latest book, "Dear David: Dealing With My Son's Addiction One Letter at a Time," is a collection of those missives to her missing son.
"Writing the letters was just getting it out into the universe and letting it see the light of air, so that people could see the pain," said Wegner, of St. Paul.
She never expected the response she would get from other parents of kids who were dealing with addiction. "Everyone kept saying, 'This is my story.' "
Hay, now 19, is safe and sober. But when he was on the streets, he had come across his mother's blog.
"I absolutely hated it," he said. "When you're using, you tell yourself all of these stories and justifications, so you feel OK with living the life you're living and doing the things you're doing."