Generate a context and a hypothesis.
Context: Ruth Plumly Thompson (27 July 1891 – 6 April 1976) was an American writer of children's stories, best known for writing many novels placed in Oz, the fictional land of L. Frank Baum's classic children's novel "The Wonderful Wizard of Oz" and its sequels.

Hypothesis: Ruth Plumly Thompson wrote quite a few books before her death.