Prince Charles may want to hide under a pile of coats when Prince Harry releases his memoir, a royal author has warned.
Harry is set to release a tell-all book next year, which he promises will be a "wholly-truthful and accurate" account of his life so far.
Since stepping down as a senior royal and moving to the US with wife Meghan Markle, Harry has been quite outspoken about the fractured relationship with his father Charles.
During a bombshell interview with Oprah Winfrey, Harry accused his dad of refusing to take his calls and claims he cut him off financially.
Harry has also appeared on the Apple TV series The Me You Can't See, where he spoke about the royals' "total neglect" and the Armchair Expert podcast, where he lashed out at Charles's parenting.
Now author Andrew Morton, who famously wrote a biography on Princess Diana, says that Charles could be "in the firing line" again when Harry's book is published.
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He told the Royally Us podcast: "If I was Prince Charles, I’d be looking for a pile of coats to hide under.
“Because I think that the book that’s going to come out next year is written by someone who spends a lot of time investigating father-son relationships because he ghost-wrote a book on Andre Agassi, who had a difficult relationship with his father.
“So I think we’re going to see Charles once more in the firing line.
“So if I was Prince Charles, I’d be looking for a hard hat and a flak jacket.”
Harry's book is expected to hit the shelves next year, the same year that the Queen celebrates her historic Platinum Jubilee.
He has been secretly working on a memoir for nearly a year with ghostwriter J.R Moehringer - and it has triggered a "tsunami of fear" in royal circles.
In a statement confirming the book, Harry said: "I'm writing this not as the prince I was born but as the man I have become.
“I've worn many hats over the years, both literally and figuratively, and my hope is that in telling my story - the highs and lows, the mistakes, the lessons learned.
"I can help show that no matter where we come from, we have more in common than we think."
