Famous for her Martha Years and Charlotte Years series of Little House on the Prairie prequels. She is also known for contributing to the GeekMom blog on Wired.com.
Early in her career, she published a series of books called the Carmen San Diego Mysteries.
Her short children's books include Fox and Crow are NOT Friends and the Inch and Roly series.
She has six children with her husband and fellow writer, Scott Peterson. Her oldest daughter had leukemia, but recovered.
She based her Martha and Charlotte books on research she had carried out regarding the lives of the ancestors of Little House series author Laura Ingalls Wilder.