Oz, the Complete Collection, Volume 1: The Wonderful Wizard of Oz; The Marvelous Land of Oz; Ozma of Oz

Magisterium: The Iron Trial

Oz, the Complete Collection, Volume 2: Dorothy and the Wizard in Oz; The Road to Oz; The Emerald City of Oz

The Lost Hero (Heroes of Olympus Book 1)

Dorothy and the Wizard in Oz: American Literature

Magisterium: The Golden Tower

Magisterium: The Copper Gauntlet

Oz, the Complete Collection, Volume 3: The Patchwork Girl of Oz; Tik-Tok of Oz; The Scarecrow of Oz

The Sorcerer of the North: Book Five

Rinkitink in Oz: American Literature

Magisterium: The Silver Mask

Magisterium: The Bronze Key

Oz, the Complete Collection, Volume 4: Rinkitink in Oz; The Lost Princess of Oz; The Tin Woodman of Oz

The Siege of Macindaw: Book Six

The Lost Princess of Oz: American Literature