Yang and Siegel signed books at Politics and Prose

I stopped in Politics and Prose on Nebraska Ave, NW to pick up a novel today and noticed in the children's section that they had signed copies of Gene Yang's award-winning American Born Chinese and Mark and Siena Cherson Siegel's To Dance: A Ballerina's Graphic Novel. They didn't have an instore event but just stopped by to sign some books probably before the ALA meeting previously posted on. I already had ABC, but bought both anyway as I like a signed book.