Former US First Lady Michelle Obama’s memoir, titled “Becoming,” has sold more copies than any other book published this year.

Axar.az reports citing Sputnik.

American book publisher Penguin Random House announced on Friday that the former first lady's book had sold over 2 million copies in all formats and editions in the US and Canada alone during the first 15 days of its publication.

"Mrs. Obama's book is a runaway bestseller worldwide, having achieved the # 1 adult nonfiction ranking in the United Kingdom, Germany, France, Italy, Holland, Spain, Denmark, Norway, Finland, and Greece. Additional countries where it is a national bestseller include Australia, Israel, Korea, Taiwan and South Africa," Penguin Random House added.

In her book, Obama chronicles her childhood on the south side of Chicago, her career as a lawyer as well as her relationship with US President Barack Obama. The last third of her book follows Obama's journey through the White House and has gained a fair amount of notoriety for its swipes at US President Donald Trump.

At one point in her memoir she writes that she stopped "even trying to smile" when Trump was being sworn into office in January 2017.

According to a Penguin Random House news release, Obama is currently on a 10-city US book tour.

Already in its sixth printing, Obama's memoir has sold an estimated print 3.4 million copies in the United States and Canada, according to the Washington Post.