L. Frank Baum 
The Bluebird Books: 5 Novels About Mary Louise 

Five novels originally published between 1916 and 1922, written by Frank Baum, author of the Oz books, under the name of Edith Van Dyne. This file includes: Mary Louise, Mary Louise inthe country, Mary Louise Solves a Mystery, Mary Louise and the Liberty Girls, and Mary Louise and Josie O’Gorman. According to Wikipedia: ’The Bluebird Books is a series of novels popular with teenage girls in the 1910s and 1920s. The series was begun by L. Frank Baum using his Edith Van Dyne pseudonym… Baum wrote the first four books in the series, possibly with help from his son, Harry Neal Baum, on the third. The fifth book is based on a fragment by Baum and written by an unknown author… The books are concerned with adolescent girl detectives… The Bluebird series began with Mary Louise, originally written as a tribute to Baum’s favorite sister, Mary Louise Baum Brewster.’