The Louis Vuitton company collaborated with the Nazis during the German occupation of France in the second world war.
Caroline Babulle, a spokeswoman for the publisher, Fayard, said: "They have not contested anything in the book, but they are trying to bury it by pretending it doesn't exist."
Responding to the book's release in 2004, a spokesman for LVMH said: "This is ancient history. The book covers a period when it was family-run and long before it became part of LVMH. We are diverse, tolerant and all the things a modern company should be."
"Their attitude changed completely the moment I mentioned the war years, from being very helpful to not responding to questions at all," she said.
From historical archives she discovered that Louis Vuitton had a store on the ground floor of a fabulous property, the Hotel du Parc, in Vichy where Pétain set up his puppet government. While the other shopkeepers, including the jewellers Van Cleef & Arpels, were shut down, Vuitton was the only one allowed to stay.
Henry Vuitton the company leader at the time, a regular at the local cafe frequented by the Gestapo, was one of the first Frenchmen to be decorated by the Nazi-backed government for his loyalty and his efforts for the regime.
"Part of the collaboration was due to the family's obsession with the survival of the company, and part down to the fact that there was a certain sympathy with the regime's right wing views," the author said.