"Three Dog Nightmare" by the singer Chuck Negron. I read it when I was struggling with my own addictions.
After he lost everything to heroin, he was sleeping on the floor of an abandoned building and living out of a duffel bag. He was down to 126 lbs., had hepatitis C, emphysema and was given less than 5 years to live.
After 38 stints in rehab, he finally got clean in 1991. Now he's 78 years old, looks and sounds better than he did in his 40's, and just got married to a beautiful woman.
It made me realize that if he could turn his life around, so could I.