Cory Doctorow's book 'Careless People' is a tell-all memoir about Sarah Wynn-Williams' years at Facebook.Facebook's role during the Christchurch quake plays a significant role in Wynn-Williams' passion for the company.Wynn-Williams becomes a crucial asset for Facebook's pursuit of acquiring non-US users.The book covers details about Facebook, Mark Zuckerberg's personality, and interesting incidents like Brooke Oberwetter and Reddit.