By Emily Goodin - 05/07/13 04:46 PM EDT
The first lady was signing copies of her first tome, American Grown: The Story of the White House Kitchen Garden and Gardens Across America, at Politics & Prose bookstore on a rainy Tuesday morning in Washington.
"Buy away. It’s Mother’s Day. It’s coming up. I would say that I was going to give this as a gift to my mother, but she already has, like, 10 copies. But I might buy her another one just for the heck of it. But it’s a great gift, and hopefully you share it with your family and friends," she told the crowd.
The first lady is donating all of her proceeds to the National Park Foundation.