The temporary restraining order prevents the release of the 240-page book until at least a July 10 court hearing that will see Mary Trump and her publisher, Simon & Schuster, defend its publication. They said the book violates a nondisclosure agreement that was part of the estate of Fred Trump, President Trump's father, after his death in 1999.
A tell-all book by President Donald Trump's niece can not be published until a judge decides the merits of claims by the president's brother that its publication would violate a pact among family members, a judge said Tuesday. The order sets the stage for more proceedings on the matter next month.
Lawyers for Ms Trump say they will "immediately appeal" the ruling.
"Under the First Amendment, the standard has always been there has to be a compelling reason to justify blocking publication with a restraining order", Gutterman said.
Mary isn't having it, and her attorney Theodore Boutros Jr. put out a statement saying, "President Trump and his siblings are seeking to suppress a book that will discuss matters of utmost public importance".
"We look forward to vigorously litigating this case, and will seek the maximum remedies available by law for the enormous damages caused by Mary Trump's breach of contract and Simon & Schuster's intentional interference with that contract", Harder said. "Short of corrective action to immediately cease their egregious conduct, we will pursue this case to the very end".
President Trump, like his brother, last week told Axios that Mary's non-disclosure agreement prevents her from revealing family secrets.
Mary Trump is a trained psychologist who was reportedly a source for New York Times reporting on Trump family tax affairs and who has expressed opposition to her uncle on Twitter.
Simon & Schuster published The Room Where It Happened, former national security adviser John Bolton's tell-all memoir which a federal judge declined to block.
"We plan to immediately appeal this decision to the Appellate Division, and look forward to prevailing in this case based on well-established precedents regarding prior restraint", the publisher said, according to the news outlet.
Charles Harder, an attorney for Robert Trump, said his client was "very pleased". She and her brother Fred III said in court papers that someone in or connected to the Trump family got Fred Sr.to change his will and give them less than they expected. Instead, he said the merits of Robert Trump's petition deserved to be heard in court before the book can be published. He said it will be up to Mary Trump and the publisher to show why an order to block the book should not be made. If a book violates such a deal, that can be dealt with by the courts after publication, he said. Robert Trump then filed his petition with the state's Supreme Court.