In The Facebook Effect: The Inside Story of the Company That Is Connecting the World, David Kirkpatrick, a senior tech writer at Fortune magazine, presents an authorized biography of the Internet phenomenon that started in a Harvard dorm. The book includes questions of privacy. Tuesday, July 27, at 7 p.m. Politics and Prose, 5015 Connecticut Ave. NW. Call 202-364-1919 or visit politics-prose.com.