Meghan will also pen a book as part of Harry’s deal (Image: PA)

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Meghan Markle is set to write her own book as part of Prince Harry's lucrative publishing deal, it has been claimed.

The mum-of-two will pen a wellness guide as part of the Sussexes' Penguin Random House contact, which is reportedly worth up to £29million, reports the Daily Mail.

The title of the book is not yet known and there is no news of a publication date.

Meghan has already released a children's book, The Bench, which hit the shelves earlier this year and she has lots of experience writing through her pre-royal lifestyle blog, The Tig.

She used the page to write about travel, fitness, foot and drink.

Meghan's children's book, The Bench
(Image: Penguin Random House via REUTERS)

However she closed the blog down when things got serious with Harry, leaving a goodbye message to her loyal fans.

She wrote: "To all my Tig friends.

"After close to three beautiful years on this adventure with you, it's time to say goodbye to The Tig. What began as a passion project (my little engine that could) evolved into an amazing community of inspiration, support, fun and frivolity.

"You've made my days brighter and filled this experience with so much joy. Keep finding those Tig moments of discovery, keep laughing and taking risks, and keep being 'the change you wish to see in the world'.

"Above all, don't ever forget your worth – as I've told you time and time again: you, my sweet friend, you are enough.

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Meghan wrote about the things she cared about on her blog, including her dogs
(Image: Instagram/MeghanMarkle)

"Thank you for everything Xx"

Prince Harry announced the Penguin book deal last week, revealing he will be publishing an "accurate and wholly truthful" memoir next year.

In a statement he said he was writing it "not as the prince I was born but as the man I have become".

The news has reportedly caused “tsunami of fear” in royal circles.

A source told the Mirror: "Ever since leaving royal life, Harry and Meghan have made claim after claim of how they allege they have been treated. They say that it is their truth but there is only ever one truth.

Harry's memoir will hit the shelves next year and is reportedly causes fear behind palace walls
(Image: Mattel, Inc)

"Since their interview with Oprah Winfrey tensions have been running very high as much of what they said has since been proven to be unreliable at best.

"There is a now tsunami of fear among the royals over what Harry will write. Many hope he may correct a few things but do not hold much hope."

Meghan and Harry used their interview with Oprah Winfrey to make a series of shocking claims about life at the Palace, and fans have already started speculating what the prince will say in the book.

Some of the questions that remain unanswered are which member of the royal family asked questions about Archie's skin colour and what happened at the Sandringham Summit.

It's unknown what topics Harry will discuss in his book
(Image: WireImage)

The Mail claims that Harry oversaw the bidding for the book deal, telling them to start offers at £18million. The newspaper claims the final figure could have reached £29million.

The deal comes with Harry and Meghan, 39, having already signed multi-pound deals with the likes of Netflix and Spotify after stepping down as senior royals in March 2019.

A publishing insider told the Daily Mail the prince's negotiating style was of the "take it or leave it" variety.

"Those involved were actually very shocked by his approach, which was to look at them coldly and state his demands: $25million," they explained.

The source said the "most shocking" part of the deal is that Harry will wait to pen his second book until after his grandmother has died.

"People [will] start asking, naturally: what has he got, who is he going to target?" they said, adding it appeared in "very bad taste".

The Firm is said to be concerned by the Duke's decision to collaborate with ghostwriter JR Moehringer on what Penguin described as "the definitive account of the experiences, adventures, losses, and life lessons that have helped shape him".

He and Meghan have already made multiple damaging allegations since stepping aside, including during their interview with Oprah Winfrey in March.