Masson later wrote several books critical of psychoanalysis, including The Assault on Truth: Freud's Suppression of the Seduction Theory. In the introduction to The Assault on Truth, Masson challenged his critics to address his arguments: "My pessimistic conclusions may possibly be wrong. The documents may in fact allow a very different reading."[9] Janet Malcolm interviewed Masson at length when writing her long New Yorker article on this controversy, which she later expanded into In the Freud Archives, a book that also dealt with Eissler and Peter Swales. Masson sued The New Yorker for defamation, claiming that Malcolm had misquoted him. The ensuing trial drew considerable attention.[10] The decade-long, US$10 million lawsuit came to a close in 1994 when the court ruled in The New Yorker‘s favor.[11] "The Court of Appeals affirmed ... that Malcolm had deliberately altered each quotation not found on the tape recordings, but nevertheless held that petitioner failed to raise a jury question of actual malice."[12] Subsequent to the case, Janet Malcolm claimed to have found her handwritten notes indicating that Masson had lied in relation to the remaining disputed quotations, as he had lied in relation to quotations where there were recordings.[13][14]
In 1985, Masson edited and translated Freud's complete correspondence with Wilhelm Fliess after having convinced Anna Freud to make it available in full. He also looked up the original places and documents in La Salpêtrière Hospital in Paris,[15] where Freud had studied with Charcot. Masson writes that the scientific community has been largely silent about his views, and that he suffered personal attacks once he deviated from the traditional views on the seduction theory and the history of psychoanalysis.[4] Both the traditional view and Masson's case against it are built on the account that Freud's seduction theory patients reported having been sexually abused in early childhood; several Freud scholars have disputed this account.[16]
- 1984. The Assault on Truth: Freud's Suppression of the Seduction Theory. Farrar Straus & Giroux. ISBN 0-374-10642-8
- 1984. "Freud and the Seduction Theory A challenge to the foundations of psychoanalysis," The Atlantic Monthly, February 1984.
- 1985. (editor and translator) The Complete Letters of Sigmund Freud to Wilhelm Fliess, 1887-1904. ISBN 0-674-15420-7
- 1986. A Dark Science: Women, Sexuality and Psychiatry in the Nineteenth Century. ISBN 0-374-13501-0
- 1988. Against Therapy: Emotional Tyranny and the Myth of Psychological Healing. ISBN 0-689-11929-1
- 1990. Final Analysis: The Making and Unmaking of A Psychoanalyst. Addison-Wesley. ISBN 0-201-52368-X