Publishing house Penguin has said it "undertook all the necessary due diligence" before releasing The Salt Path, after a series of claims about the book's veracity. A recent Observer investigation claimed English author Raynor Winn fabricated or gave misleading information about some elements of her 2018 non-fiction best-seller.

After an investigation cast into doubt the events of her best-selling memoir, Winn's publisher has been forced to delay her next book, 'On Winter Hill.'

In a statement on Friday, Penguin Michael Joseph, which published The Salt Path in 2018, said Raynor Winn’s next book On Winter Hill, will be delayed.