The advice columnist E. Jean Carroll accused President Trump of sexually assaulting her in the mid-1990s in her forthcoming book.

In “What Do We Need Men For?,” her account of being harassed and mistreated by a series of men, which St. Martin’s Press is expected to publish next month, Ms. Carroll, the author of “Ask E. Jean” in Elle magazine, alleges that Mr. Trump raped her in 1995 or 1996, in a Bergdorf Goodman dressing room. An excerpt that includes her account was published on New York magazine’s website earlier Friday.

Mr. Trump, in a statement, emphatically denied the incident. “I’ve never met this person in my life,” he said, although the excerpt in New York magazine was accompanied by a photograph that showed the two together at a 1987 party. “She is trying to sell a new book — that should indicate her motivation. It should be sold in the fiction section.”

[President Trump called E. Jean Carroll a liar. She has now sued him for defamation.]

In her book, Ms. Carroll describes what begins as a friendly encounter, as Mr. Trump, whom she’d met once before, asks her to try on lingerie that he is considering buying as a gift. Once they entered the dressing room, according to Ms. Carroll, Mr. Trump pushed her against the wall, pushed his mouth against her lips, then pulled down her tights, unzipped his pants and forced his “fingers around my private area, thrusts his penis halfway — or completely, I’m not certain — inside me.”