It added: “The unfettered right to publish is a sacred American freedom and a founding principle of our republic, and we applaud the Court for affirming well-established precedents against prior restraint and pre-publication injunctions," it added.
“'Too Much And Never Enough' is a work of great significance, with very real implications for our national discourse, and we look forward to bringing it to a public that is clearly eager to read it," wrote Simon & Schuster.
Messages seeking comment were left with an attorney for Robert Trump.
On the eve of its publication, Mary Trump's book was ranked No. 1 on the Amazon.com list of best-selling books.
(Writer: Larry Neumeister, Associated Press)