Former President Obama on Tuesday promoted former first lady Michelle Obama’s new memoir, saying that the book "tells her quintessentially American story."

"Of course, @MichelleObama’s my wife, so I’m a little biased here. But she also happens to be brilliant, funny, wise – one of a kind. This book tells her quintessentially American story," Obama wrote in a tweet.

“Becoming," hit shelves on Tuesday. To promote the book, the former first lady is embarking a tour, which begins Tuesday in Chicago. Oprah Winfrey is slated to appear with Obama during the first stop, and various other celebrities and media figures will be featured at later events.

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Obama's promotional tour will also include stops in Los Angeles, Washington, D.C., Boston, Paris and London.

Former Secretary of State and Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE on Tuesday joined in promoting the memoir, calling it "wonderful" and saying that Obama's "fierce intelligence" is evident "on every page."