Former First Lady Michelle Obama has written a new memoir to follow up her best-selling "Becoming." Obama wrote in an Instagram post, "Like so many of you, I've spent a lot of time these past few years thinking about how to keep myself centered in a world filled with so much uncertainty. That process of reflection actually led me to start writing again – and today, I could not be more thrilled to tell you about my new book, The Light We Carry, which comes out on November 15."