DETROIT — In his new autobiography "Devil on My Shoulder," Detroit-bred shock rocker and Rock & Roll Hall of Famer Alice Cooper details the depths of his drug use, particularly crack cocaine.

"It's only the most addictive thing on the planet," Cooper says of crack, in an excerpt from the book shared with The Telegraph. "I'd never smoked cigarettes, hardly ever smoked marijuana, but I went all in" on crack, he writes.

"I wasn't doing a gram a week, I was doing two grams a day. The next thing I knew, I was so obsessed that I was getting nothing else done. All I was thinking about was, Where do I get my next supply? Do I have enough? What do you mean I'm going to Europe? How am I going to manage without it?"

In an interview with The Telegraph, Cooper says his crack use was so bad, it "almost killed me."

Cooper went to rehab, twice, and has been clean since 1983.

Now 78, Cooper says sobriety is essential, especially on the road.

"If you're in a touring band, nobody gets high, nobody ever drinks, because now it's a big business and you can't afford to have a guy that's doing that," he tells The Telegraph.

"Now, almost everybody’s a health freak. Mick Jagger's, what, 82? He does a half an hour on the treadmill before a three-hour show. Come on! He's everybody’s blueprint for lead singers. Nobody gets better than that."

Cooper's "Devil on My Shoulder" is due out Oct. 6. Cooper is featured on "Moving Mountains," a track with outlaw country singer Cody Jinks, which will be released Friday.

Cooper kicks off a run of tour dates on Oct. 27, which includes a Nov. 6 date at The Colosseum at Caesars Windsor and a Nov. 7 date at Wings Event Center in Kalamazoo.

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