The reason to write this book could not be more obvious. With the inauguration of Donald Trump on January 20, 2017, the United States entered the eye of the most extraordinary political storm since at least Watergate. As the day approached, I set out to tell this story in as contemporaneous a fashion as possible, and to try to see life in the Trump White House through the eyes of the people closest to it. This was originally conceived as an account of the Trump administration’s first hundred days, that most traditional marker of a presidency. But events barreled on without natural pause for more than two hundred days, the curtain coming down on the first act of Trump’s presidency only with the appointment of retired general John Kelly as the chief of staff in late July and the exit of chief strategist Stephen K. Bannon three weeks later.