Since its release in November, Michelle Obama’s memoir Becoming is about to make history.

According to Penguin Random House’s Thomas Rabe, the former First Lady’s book is on track to be the most successful memoir ever as it sells over 10 million copies.

“We believe [it] could well become the most successful memoir ever,” he said on Tuesday according to The Wall Street Journal.

RELATED: Jennifer Lopez And Alex Rodriguez Got An Engagement Congratulations Letter From Barack And Michelle Obama

He added, “I’m not aware, in my personal experience with Penguin Random House, that we ever sold 10 million units of a memoir.”

Not only is the hard copy of the novel doing extremely well, but the audiobook, narrated by Obama herself, has become the fastest-ever seller from the publishing company. It also received more pre-orders than any other adult book since 2015.

Obama, 55, toured the U.S. while promoting Becoming, which details her journey from childhood to the White House, with celebrity moderators like Oprah and Reese Witherspoon surprising guests.

RELATED: Michelle Obama Talks Parenting Malia And Sasha In The ‘Crazy, Abnormal World’ Of The White House

Michelle and her husband, former U.S. President Barack Obama, signed a joint deal with Penguin Random House in 2016. The former American leader’s memoir is set to be released later this year.

Meanwhile, the former First Lady is heading to Toronto to promote Becoming this May.

Click to View Gallery
25 Of Barack And Michelle Obama’s Most Memorable Moments In The Spotlight