She has fiction books about America's past historical moments: coming to America, pioneers moving westward, Visiting the Vietnam Memorial, and the Los Angeles riots.
Yes, there are some less serious stories too. Hurry, Hurry is one of the cutest books I've ever read. And Little Badger is funny too.
While you probably won't go and pull one of her books off of the shelves just for the heck of it, she's a good author to keep in mind when you're dealing with a new issue in your house.