Fifty Shades of Grey outsells Harry Potter on Amazon UK

  • Erotic novel Fifty Shades of Grey has outsold all seven Harry Potter books on Amazon.co.uk, making E.L. James the website's best-selling author ever.

    The novel is also the website's biggest-selling book of all time, surpassing sales of the previous record holder, Harry Potter and the Deathly Hallows.

    Fifty Shades of Grey tells the story of a sadomasochistic affair between wealthy entrepreneur Christian Grey and innocent literature student Anastasia Steele.

    Dubbed as "mummy porn", the novel has raced to the top of book charts all over the world following its release in 2011.

    More than 4 million copies in print and on Kindle have been sold at Amazon's UK website alone since March.