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J.K. Rowling: I Could Write More "Harry Potter" Books

Author J.K. Rowling signs copies of "Harry Potter and the Deathly Hallows" for 1,600 public school children at the Kodak Theatre in Los Angeles on Oct. 15, 2007. AP Photo/Ric Francis

CHICAGO (CBS/AP) Could Harry Potter return to work more magic?

J.K. Rowling is leaving open the possibility. She told Oprah Winfrey in a taped interview airing Friday that she may someday write another novel in the popular series.

Rowling, 45, says the characters are still in her head and she could write several new books about them.

"I could definitely write an eighth, ninth, tenth," she told Winfrey, according to People magazine, of the beloved books. "I'm not going to say I won't. I don't think I will ... I feel I am done, but you never know."

For now, she added, she feels she's moved on to a new phase of her writing.

More than 400 million copies of the books about the boy wizard have been sold. Rowling says fame brought extreme pressures, including paparazzi and reporters searching her trash.

She says it was "like being a Beatle" and there was a time she "was barely hanging by a thread."