Michelle Obama’s smash book, “Becoming” might be the most successful memoir in history, reports The Wall Street Journal. The former first lady’s book has sold nearly 10 million copies around the world since its November release, publisher Penguin Random House said Tuesday. The book was an immediate success, climbing to No. 1 in the United States, Germany, Greece and the United Kingdom in its first 15 days. It sold two million copies in that time span to become the bestselling book of 2018. Michelle Obama’s book explores her childhood, her work, motherhood and her time in the White House. She reveals difficulties in her marriage with Barack Obama and how the couple suffered a miscarriage. She is in the middle of the second leg of her popular book tour.