Despite a half-century career as one of the world's top-selling authors, 38 books and a bulging bank account, Ken Follett told AFP he still worries about one of his readers struggling with a "dull" page.

The 76-year-old Welshman, who recently took French nationality, is in the final stages of a tour promoting his latest tome, the more than 600-page epic "Circle of Days".

At a stage of life when most people are slowing down, Follett said he still gets the same kicks -- and suffers from the same anxieties -- as he did when he started.

"If there's a page that is a bit dull, and millions of people are going to think that it's a bit dull, they're going to start losing interest," he explained during an interview in Paris.

"There can't be boring bits in my books."

The self-confessed "perfec

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