L. Frank Baum: Tic Tok of OZ: Tik-Tok, the Mechanical Man of OZ, helps solve a mystery.

L. Frank Baum: The Lost Princess of OZ: Princess Ozma is missing! Dorothy and Toto must find her but have many misadventures

L. Frank Baum: The Road To OZ: Dorothy meets the Shaggy Man, and while trying to find the road to Butterfield, they get lost on an enchanted road. As they travel they meet the rainbow's daughter, Polychrome, and a little boy, Button-Bright.

The Wizard of Oz

L. Frank Baum: The Tin Woodman of OZ: This OZ story is about the many exciting adventures of the Tin Woodman and his heart

Ozma of Oz (Oz Series, Book 3)

The Road to Oz (Oz Series, Book 5)

The Wonderful Wizard of Oz (Oz Series, Book 1)

The Marvelous Land of Oz (Oz Series, Book 2)

L. Frank Baum: The Marvelous Land of OZ: The 2nd book in the Wonderful Wizard of Oz series