Facebook’s former director of corporate communications Brandee Barker sent a nasty message to ex-Facebook employee Katherine Losse who published a critical review of Facebook COO Sheryl Sandberg’s new book Lean In. Losse captured a screenshot of the message and shared it on social media. Barker is serving as a spokesperson for Sandberg, and she recently launched a new firm, The Pramana Collective, with fellow West Coast PR execs Sean Garrett and Brian O’Shaughnessy.


