An arbitrator has decided in favor of Meta in a case the company brought against Sarah Wynn-Williams, the former Meta employee who wrote a memoir published this week detailing alleged claims of misconduct at the company. Macmillan Publishers and its imprint that published the memoir, Flatiron Books, were also named as respondents.

Meta has notched an early victory in its attempt to halt a surprise tell-all memoir from a former policy executive turned whistleblower. An arbitrator has sided with the social media company, saying that the book’s author should stop selling and publicizing the book,