(CNN) Lisa Marie Presley is "grateful to be alive today."

The daughter of Elvis Presley has written a foreword for the new book "The United States of Opioids: A Prescription for Liberating a Nation in Pain" by Harry Nelson.

In it she talks about her own struggle with addiction.

Lisa Marie Presley first went public in 2018 with her substance abuse problem.

Presley wrote that in August she was on "Today" to promote the album "Where No One Stands Alone," a compilation of gospel songs by her late father, when show co-host Jenna Bush Hager asked her a direct question about addiction.

Presley wrote that she said, "I'm not perfect. My father wasn't perfect, no one's perfect. It's what you do with it after you learn and then you try to help others with it."

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