L. Frank Baum 
Mary Louise 

First published in 1916, 'Mary Louise’ by popular children’s author L. Frank Baum is the first in a series of children’s detective stories about the courageous young Mary Louise Burrows. Wise beyond her years, Mary Louise lives with her mother and grandfather while attending a local boarding school. After a strange encounter with a stranger, Mary Louise learns that her grandfather is being sought by the State Department and is devastated when he has to flee in the middle of the night with her mother. Certain that he is not guilty of any crime, Mary Louise must work quickly to clear her grandfather’s name. A thrilling mystery from the prolific 'Oz’ author. –