Oprah Winfrey cast quite a spell over 'Harry Potter' author J.K. Rowling, luring the reclusive novelist onto her show for an interview that aired Friday. And if you thought Rowling would confirm Harry's retirement, well, the British writer had other tricks up her sleeve.

"I could definitely write an eighth, a ninth book," Rowling said, tantalizing fans of the beloved wizard series. "I think I am done, but you never know."

The sit-down occurred in Edinburgh, Scotland, where the two talked about how the 1990 death of Rowling's mother left the writer with a well of grief -- and inspiration.

"The books wouldn't be what they are if she hadn't died," explained Rowling. "I mean, her death is literally on every other page in the 'Harry Potter' books."