Within days of its release, Prince Harry's controversial book has become the UK's highest selling memoir ever - with a rumour that three more could be in the pipeline.
With thousands of copies sold, it is raking in millions of pounds, and a publishing expert believes the Duke of Sussex could be tempted by the large sum of money to continue writing.
Since January 10, a staggering 750,000 copies of Spare have been sold across hardback, audio and eBook. According to official figures from Nielsen BookScan, almost 470,000 were bought in print and all of these sales in total were worth £6.6 million in the UK alone.
