The Department of Justice (DOJ) on Tuesday, June 16, filed a lawsuit seeking to prevent President Donald Trump’s former National Security Adviser John Bolton from disclosing classified information in his new book.

“This is a civil action by the United States to prevent Defendant John R. Bolton, a former National Security Advisor, from compromising national security by publishing a book containing classified information—in clear breach of agreements he signed as a condition of his employment and as a condition of gaining access to highly classified information and in clear breach of the trust placed within him by the United States Government,” the department explained in its complaint’s introduction.

The DOJ said that during his former post in the White House, from April 2018 to September 2019, Bolton had “a high-level role in which he regularly came into possession of some of the most sensitive classified information that exists in the U.S. government.”

And though Bolton removed some classified information from the manuscript, the National Security Council (NSC) has determined that some secrets remain in his book.

“NSC has determined that the manuscript in its present form contains certain passages—some up to several paragraphs in length—that contain classified national security information,” reads the lawsuit. “In fact, the NSC has determined that information in the manuscript is classified at the Confidential, Secret, and Top Secret levels.”

The DOJ said that Bolton’s book, “The Room Where It Happened,” once released, “would cause irreparable harm, because the disclosure of instances of classified information in the manuscript reasonably could be expected to cause serious damage, or exceptionally grave damage, to the national security of the United States.”

The breach-of-contract suit, which the DOJ filed in federal court, came one week before Simon & Schuster is scheduled to publish the book on June 23, The Washington Times reported.

Bolton was reportedly paid $2 million for the tell-all manuscript.

The former national security adviser was dismissed after a series of foreign policy disagreements with President Trump.