Careless People author Sarah Wynn-Williams stands behind former Indonesian President Joko Widodo and Mark Zuckerberg in 2014. Photo: Oscar Siagian/Getty Images Sarah Wynn-Williams can’t do interviews. She can’t post on social media or go on tour or give a talk. Her family can’t speak on her behalf, and her friends are afraid to. None of this has affected the sales of her first book, a memoir of the six years she spent working for Facebook. Instead, it may have helped them: The moment that an