Meghan Markle's Sister Samantha Releasing Biography She 'Won't Like' Next Week

Meghan Markle's estranged sister Samantha Markle has a biography out next week which promises "the truth" against "all odds and ultimatums."

The Diary Of Princess Pushy's Sister Part 1 will be published by Barnes and Noble on Sunday, January 17—with the publisher promising that "sometimes the truth really is stranger than fiction."

The book comes just two days before Meghan's lawyers apply to avoid a messy trial in her privacy and copyright case against the Mail on Sunday over the collapse of her relationship with her father, Thomas Markle.

He is likely to feature prominently in the memoir, with publicity promising it will focus on the author's "life and family."

Meghan Markle Visits Syndey, Australia
Meghan Markle smiles during a reception hosted by the Governor General at Admiralty House in Sydney on October 16, 2018. Her sister Samanthan Markle is releasing a biography, 'The Diary of Princess Pushy's Sister Part 1.' STEVE CHRISTO/AFP/Getty

Samantha Markle, previously referred to as Samantha Grant, said some of the book Meghan "won't like" when she announced it in 2017.

The Barnes and Noble website states: "Amidst a firestorm of fake news and media mayhem, Samantha Markle shares the truth about her life and family against all odds and ultimatums, as a royal fairytale plummets from the tea towels.

"Sometimes the truth really is stranger than fiction."

The diary is 328 pages long and the publisher describes its author as "the sister of the first modern American duchess."

It says she is "defending truth in spite of stereotypes and 'fake news'" in the long-planned book, which she discussed publicly in 2017.

At the time, she told the Daily Star: "My book deals with my bi-racial family in a candid, warm, personal and socially important way.

"Maybe when Meghan is more mature and reads the book she'll understand. Some of it she won't like, some of it she might."

The Duchess of Sussex is hoping to win her case against the Mail on Sunday through a "summary judgement," in which the judge rules the case can be decided without the need for a trial.

If she fails, Meghan and Samantha's father Thomas Markle will be expected to give evidence refuting his royal daughter's claims when the trial goes ahead in the autumn.

Originally, the case was due to begin on January 11, meaning the book would have come out either right in the middle or shortly after Meghan and her father testified under oath.

A filing at the High Court in London says the two-day hearing to decide whether a trial is necessary will take place on January 19 and 20.

The court has set aside Monday, January 18, the day after publication of the book, for "pre-reading."

Samantha Markle's bio on Barnes and Noble states: "Born in Chicago in the 1960s and raised in southern California, Samantha Markle is an author, screenwriter and counselor, as well as being the sister of the first modern American duchess.

"Having battled MS in a wheelchair for most of her adult life, she's no stranger to challenges or tenacity. With one screenplay in pre-production and her first book completed she continues to roll uphill as a 'squeaky wheel,' inspiring others and defending truth, in spite of stereotypes and 'fake news.'"