Fifteen days after its release,Michelle Obama’s memoir is now the best-selling book of 2018.

That includes all formats: hardcover, e-book, and audio sales.

This after selling a massive 725,000 copies on its first day in print.

Michelle Obama Holds First Book Signing In Her Hometown Of Chicago

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In the U.S. and Canada,Becomingwill have 3.4 million copies in circulation with its sixth printing.

The title remains in the No.

1 spot ofThe New York Times' best-seller lists for Hardcover Nonfiction and the Combined Print and E-Book Bestsellers.

The former first lady is also currently ona 10-city book tour across America.

Upcoming stops are scheduled in Brooklyn, Detroit, Denver, San Jose, and Dallas.