One of the best-selling books of the decade was her memoir "Becoming"

Michelle maintained a very low public profile after Barrack Obama's presidency ended in 2017. However, she published her book "Becoming" in 2018. She discusses her upbringing, how she came to find her voice, her experience in the White House, her public health crusade, and her mothering duties in the autobiography. Michelle Obama tells her own experience as she has lived it, in her own words, and on her terms, with an admixture of unwavering honesty and vivid wit. She describes her achievements and her disappointments, both public and private.

In its first week of availability, "Becoming" sold 1.4 million copies in 24 different languages, rocketing to the top of the Amazon Best Sellers list. The longest streak of any book since the pornographic thriller Fifty Shades of Grey in 2012, according to CNN, was the most popular book on Amazon across all media for 47 straight days. The book's one million copies were given to First Book, an American nonprofit that gives books to kids. By the end of March 2019, Becoming has sold 10 million copies, making it one of the best-selling novels of the decade.