Washington, The publisher of a tell-all memoir written by US President Donald Trumps niece Mary is planning to release the book on July 14 despite an ongoing litigation aimed at blocking the book, the media report.

On Monday, publisher Simon & Schuster announced that "due to high demand and extraordinary interest", it was moving up the book's publication date by two weeks, to July 14 from July 28, Politico news reported.

According to a BBC report, Mary Trump's upcoming book, "Too Much and Never Enough, How My Family Created the World's Most Dangerous Man" claims to reveal "a nightmare of traumas, destructive relationships, and a tragic combination of neglect and abuse".

Mary Trump, a clinical psychologist, argues in the book that Donald Trump was emotionally hobbled at a young age because his mother fell ill and his hard-charging, real-estate-developer father made no effort to take over childrearing duties.

President Trump brother Robert has launched a legal drive to try to prevent publication of the book by contending that it violates a non-disclosure agreement (NDA) in a 2001 settlement deal related to the estate of their father, Fred, who died in 1999.

Earlier this month, President Trump said that his niece was violating the NDA, which according to him is a "very powerful one" that "covers everything".

This is the second book that Trump and his associates were seeking to block.

Earlier this month, the US Justice Department was denied an injunction to block a memoir by John Bolton, the President's former National Security Adviser.

"The Room Where It Happened: A White House Memoir", is due to go on sale later this month.