On Tuesday, a New York Supreme Court judge temporarily blocked the publication of an expose memoir about President Donald Trump, written by his niece Mary Trump. The book was set to go on sale in July.

Judge Hal Greenwald blocked publication of the book after Robert Trump, President’s younger brother, filed a lawsuit seeking a restraining order on the publication, citing the non-disclosure agreement that Mary signed in relation to a legal settlement of the estate of the president’s father, Fred Trump.

“Robert Trump is very pleased with the New York Supreme Court’s injunction against Mary Trump and Simon & Schuster,” Charles Harder, Robert Trump’s attorney, said in a statement.

Mary Trump’s publisher said they will “pursue this case to the very end.” Simon & Schuster said it had already shipped out thousands of 75,000 copies of Too Much and Never Enough: How My Family Created the World’s Most Dangerous Man. The publisher also added that they were unaware of the NDA agreement.

Mary Trump’s attorney, Ted Boutrous, told CNN that they will be appealing the case, adding that the order “flatly violates the First Amendment.”

“We will immediately appeal,” Boutrous said. “This book, which addresses matters of great public concern and importance about a sitting president in an election year, should not be suppressed even for one day.”

Robert Trump had previously filed a lawsuit to Queens County Surrogate Court in New York last week but the case was dismissed due to a lack of jurisdiction. Robert Trump then filed the case to the New York State Supreme Court.