The publisher says the book is also a bestseller in many other countries including Australia and Britain.
But Obama graduated from the select Ivy League university and went on to Harvard Law School before joining a Chicago law firm where she met her future husband and then U.S. president Barack Obama.
Hassan, who is reading law at SOAS University of London, said Mrs Obama had inspired her to take on voluntary work and serve as deputy secretary-general at the London International Model United Nation Foundation.
The crowd applauded when the word dropped while Obama laughed it off. "Love her DOWN. And I'm giddy bc I heard her curse", said another follower. "If we thought Barack Obama was going to erase hundreds of years of history [of inequality] in eight years, that's ridiculous".
"We are angry, we are too loud, we are too everything and I experienced that, just campaigning, just speaking truth to power, how dare I have a voice and use it?" she said.
Michelle Obama says that she sometimes feels like a fraud, even after a decade on the world stage.
"Your task is to get yourself ready because people will try to hold you back ... it will crush you if you are not ready".
Symbol of hope’ Michelle Obama gets an enthusiastic welcome from girls at a London school
Her advice to the Duchess of Sussex is simple: don't rush.
"I knew the force of Barack's mind and the vision he had for what kind of life of service he wanted to have".
In an honest, amusing account of her life and her time in the White House, Mrs Obama spoke frankly about the challenges she faced as the first black first lady - and that even one of the most famous women in the world still worries about falling over and looking stupid.
'What's inspiring to me is that so numerous young women I've met...are triumphing in incredible ways, ' she said.
Asked often about her political ambitions, Obama makes it clear in her book she has no intention of going down that route.
"This is how I picture Auntie Mich in er'yday convo cause she's a real one", wrote another. "I have never been a fan of politics and my experience over the past 10 years has done nothing to change that".
"What's inspiring to me is that so numerous young women I've met ... are triumphing in incredible ways", the 54-year-old added. "I had to watch him get increasingly worse".