Lawyers for Jennifer Lopez filed a lawsuit in Los Angeles Superior Court on Monday against Ojani Noa, the singer's first husband, to block the publication of a tell-all tome containing personal details about J. Lo and the couple's short marriage, The Associated Press reports.

The suit claims Noa has shopped the book around to potential publishers, according to the entertainment news program "The Insider" -- a direct violation, the filing contends, of a confidentiality agreement established between Lopez and Noa five months ago as part of an unrelated legal settlement. The AP reports that Ojani agreed to the terms stipulated in the agreement: He was not to malign Lopez, nor could he disclose details concerning the couple's relationship for financial benefit.

Lopez is seeking a restraining order from the court to keep Noa's manuscript from ever making it to a printing press.

Back in October, Noa -- who was briefly married to Lopez in 1997 -- dropped a breach-of-contract lawsuit he'd filed in late 2004, claiming he'd been wrongly fired as the manager of Lopez's Pasadena, California, restaurant Madre's. That suit alleged that Noa was axed after a six-month stint despite assurances from his ex that he would not be let go without "good cause or reason" (see [article id="1495148"]"J. Lo Sued By First Ex-Husband Over Firing"[/article]).

The lawsuit filed on behalf of Lopez maintains that the New York Post ran an article describing Noa's book three months ago. When Lopez's attorneys reached out to Noa to inquire about the manuscript, he responded with a letter, saying that he'd continue to shop his book around. The filing also states that Noa later said that "he would not agree to refrain from marketing his book unless [Lopez] paid him the sum of $5 million."