The Lost Princess of Oz is the eleventh canonical Oz book written by L. Frank Baum. Published on June 5, 1917, it begins with the disappearance of Princess Ozma, the ruler of Oz and covers Dorothy and the Wizard's efforts to find her. The introduction to the book states that it's inspiration was a letter a little girl had written to Baum: "I suppose if Ozma ever got hurt or losted, everybody would be sorry."

The Emerald City of Oz is the sixth of L. Frank Baum's fourteen Land of Oz books. It was also adapted into a Canadian animated film in 1987. Originally published on July 20, 1910, it is the story of Dorothy Gale and her Uncle Henry and Aunt Em coming to live in Oz permanently. While they are toured through the Quadling Country, the Nome King is assembling allies for an invasion of Oz. This is the first time in the Oz series that Baum made use of double plots for one of the books.

The Road to Oz: In Which Is Related How Dorothy Gale of Kansas, The Shaggy Man, Button-Bright, and Polychrome the Rainbow's Daughter Met on an Enchanted Road and Followed it All the Way to the Marvelous Land of Oz. is the fifth of L. Frank Baum's Land of Oz books. It was originally published on July 10, 1909, and documents the adventures of Dorothy Gale's fourth visit to the Land of Oz. The book was dedicated to Joslyn Stanton Baum, the author's first grandson, the child of Baum's eldest son Frank Joslyn Baum. Cover made by the wonderful @NinthShard.

Dorothy and the Wizard in Oz is the fourth book set in the Land of Oz written by L. Frank Baum and illustrated by John R. Neill. It was published on June 18, 1908 and reunites Dorothy with the humbug Wizard from The Wonderful Wizard of Oz (1900). This is one of only two of the original fourteen Oz books (the other being The Emerald City of Oz (1910), to be illustrated with watercolor paintings.

Ozma of Oz: A Record of Her Adventures with Dorothy Gale of Kansas, Billina the Yellow Hen, the Scarecrow, the Tin Woodman, Tik-Tok, the Cowardly Lion and the Hungry Tiger; Besides Other Good People Too Numerous to Mention Faithfully Recorded Herein published on July 30, 1907, was the third book of L. Frank Baum's Oz series. It was the first in which Baum was clearly intending a series of Oz books. It is the first Oz book where the majority of the action takes place outside of the Land of Oz. Only the final two chapters take place in Oz itself. This reflects a subtle change in theme: in the first book, Oz is the dangerous land through which Dorothy must win her way back to Kansas; in the third, Oz is the end and aim of the book. Cover made by the wonderful @-comets.

The Marvelous Land of Oz: Being an Account of the Further Adventures of the Scarecrow and the Tin Woodman, commonly shortened to The Land of Oz, published on July 5, 1904, is the second of L. Frank Baum's books set in the Land of Oz, and the sequel to The Wonderful Wizard of Oz (1900). Cover made by the wonderful @-comets.