Mary Trump has written a book titled: Too Much and Never Enough: How My Family Created the World's Most Dangerous Man, about her uncle, President Donald Trump, and their family. It is set to be published on July 28, though there is an ongoing legal challenge to its publication. She is the daughter of Fred Trump Jnr, the president’s older brother and once-heir apparent to the Trump family's real-estate business. Her mother is Linda Clapp, a flight attendant whom “Freddy” met while training to be a pilot. Newly graduated: will daughter Tiffany be Donald Trump’s next lawyer? Fred Trump Jnr and Clapp married in 1962, and had two children: Fred Trump III and Mary. Both Mary and her brother were named after their paternal grandparents, Fred Trump Snr and his Scottish immigrant wife, Mary Anne MacLeod Trump. The couple's marriage was short-lived. They divorced in 1970 after eight years of marriage, as Freddy's alcoholism got more and more out of control. Freddy died at the age of 42 in 1981 due to complications from alcoholism. He was considered a black sheep of the family for not taking an interest in the family's real-estate business. When Fred Trump Snr died in 1999, Mary Trump and her brother contested his will, which left them a substantially smaller inheritance than the other Trump grandchildren. The issue at stake was how Fred Snr’s wealth was dispersed. Most of his fortune was split between his four surviving children. But Mary and Fred III believed they deserved what would have been their father's share of the inheritance. Donald Trump responded by cutting them off the family's medical insurance plan. It was a tough blow for Fred III, who had just welcomed a baby with serious health issues. View this post on Instagram A post shared by President Donald J. Trump (@realdonaldtrump) on Oct 30, 2014 at 2:57pm PDT Mary Trump bashed the decision to cut the medical benefits in an interview with the New York Daily News in December 2000, saying her “aunt and uncles should be ashamed of themselves”. Mary Trump was referring to Donald Trump, Robert Trump and Maryanne Trump Barry, who had been named executors of their father's estate. 7 facts about Ivanka Trump that may just change your mind In court documents, Maryanne Trump Barry called Mary and Fred III “absentee grandchildren” who only saw their grandparents on holidays. But in her book, Mary Trump said she spent “much of her childhood” at her grandparents' house in Queens. Mary and Fred III's inheritance was settled privately in 2000, and Trump told The Washington Post last year that “it worked out well, and we all get along”. In an interview with Axios, published June 21, the president also said he had Mary's brother over to the White House recently. Sources told The Daily Beast that Mary Trump signed a nondisclosure agreement when that case was settled. Robert Trump, the president's younger brother, is now using the NDA in a lawsuit to stop the book's publication. Mary Trump has a master's in English literature from Columbia and a master's and PhD in psychology from Adelphi University. Her publisher says she's “taught graduate courses in trauma, psychopathology, and developmental psychology”. A LinkedIn profile which appeared to belong to Mary said she worked as a life coach. It has now been taken down. Hillary Clinton is an extraordinary human being and public servant. That she lost to this is unspeakable. — Mary L Trump (@MaryLTrump) November 9, 2016 New York State Board of Elections records show that Mary Trump is a registered Democrat, and an unverified Twitter account bearing her name includes tweets supportive of Hillary Clinton. The Twitter account was active on the night Trump was elected to president. One tweet said it was “one of the worst nights of my life,” and another said “the American experiment has failed”. 5 things to know about sneakerhead addict Barron Trump Mary Trump currently lives in New York with her daughter, according to Simon & Schuster. Her book will be a “revelatory, authoritative portrait of Donald J. Trump and the toxic family that made him,” the publisher said. In the book, Mary Trump will reportedly out herself as the primary source for a 2018 New York Times exposé on the president's finances, and blame her uncle and grandfather for failing to help her father in his time of need. A report by The Times found that the president was not a self-made man, as he had continuously claimed, but used more than US$400 million of his father's fortune to prop up his own businesses when they were struggling, through shady tax schemes. Has coronavirus really cost Donald Trump US$1 billion? According to The Daily Beast, Mary Trump will say in the book that she provided The Times with tax documents and confidential family documents. The Times has declined to respond to her claim. Among the details to be revealed in the book is also how the president mocked his father when he started to succumb to Alzheimer's in the 1990s. The president broke his silence on the book in an interview with Axios, published June 21. He said that his niece isn't allowed to publish the book because she signed a “very powerful” NDA when she and her brother settled their lawsuit. On June 26, the president's younger brother, Robert Trump, filed a lawsuit trying to prevent the publishing of Mary Trump's book, saying it violated the NDA she signed back in 2001. In response to the lawsuit, a judge in Duchess County, New York, signed off on a temporary restraining order against Mary Trump and her publisher, barring them from publishing the book. Robert Trump is being represented by celebrity lawyer Charles Harder. But an appeals-court judge quickly overturned part of the restraining order on July 1, saying it couldn't be applied to Simon & Schuster because the publisher had not signed an NDA with the Trumps. Simon & Schuster also said it didn't know about the NDA when it commissioned the book. However, it's unclear whether it can publish the book without consequences, since the temporary injunction still bars Mary Trump and “any agent” of hers from publishing the book. A statement from the publishing house did not address whether it would publish the book even if the injunction was not dropped against Mary Trump. How did Melania Trump make her millions? “We support Mary L. Trump's right to tell her story in Too Much and Never Enough , a work of great interest and importance to the national discourse that fully deserves to be published for the benefit of the American public,” Simon & Schuster spokesman Adam Rothberg said in a statement to Politico. “As all know, there are well-established precedents against prior restraint and prepublication injunctions, and we remain confident that the preliminary injunction will be denied.” Mary Trump filed an affidavit on July 2 seeking to get the injunction dropped in full. She argued that her uncle and his siblings had already violated their agreement – thus making it null and void. The court filing was the first time Mary Trump has publicly addressed her book. In the document, she said that the 2018 New York Times story on Trump proves that he lied about the assets in her grandfather's estate, and that she never would have signed the agreement had she known their true value. She said that her uncles Donald and Robert had spoken publicly about the settlement “on numerous occasions”, which means they already violated the agreement to secrecy. She also said she “never believed” the agreement would prevent her from writing a book about “the conduct and character of my uncle, the sitting President of the United States, during his campaign for re-election.” Want more stories like this? Sign up here . Follow STYLE on Facebook , Instagram , YouTube and Twitter . This article originally appeared on Business Insider .