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 its inspiration was a letter a young girl had written to Baum: "I suppose if Ozma ever got hurt or losted, everybody would be sorry."
Ruth Plumly Thompson was an American writer of children's stories, best known for writing many novels placed in Oz, the fictional land of L. Frank Baum's classic children's novel The Wonderful Wizard of Oz and its sequels.
The Royal Book of Oz (1921) is the fifteenth in the series of Oz books, and the first to be written after L. Frank Baum's death. Although Baum was credited as the author, it was written entirely by Ruth Plumly Thompson. Beginning in the 1980s, some editions have correctly credited Thompson, although the cover of the 2001 edition by Dover Publications credits only Baum.
The Good Witch of the North, sometimes named Locasta or Tattypoo, is a fictional character in the Land of Oz, created by American author L. Frank Baum. She is the elderly and mild-mannered Ruler of the Gillikin Country. Her only significant appearance in Baum's work is in Chapter 2 of The Wonderful Wizard of Oz (1900), in which she introduces Dorothy Gale to Oz and sends her to meet the Wizard, after placing a protective kiss on her forehead. She makes a brief cameo appearance at Princess Ozma's birthday party in The Road to Oz (1909), but is otherwise only mentioned elsewhere in the series.
Mombi is a fictional character in L. Frank Baum's classic children's series of Oz Books. She is the most significant antagonist in the second Oz book The Marvelous Land of Oz (1904), and is alluded to in other works. Mombi plays a very important role in the fictional history of Oz.
Kabumpo in Oz (1922) is the sixteenth Oz book, and the second written by Ruth Plumly Thompson. It was the first Oz book fully credited to her.
The Lost King of Oz (1925) is the nineteenth in the series of Oz books created by L. Frank Baum and his successors, and the fifth written by Ruth Plumly Thompson. It was illustrated by John R. Neill.
The Hungry Tiger of Oz (1926) is the twentieth in the series of Oz books created by L. Frank Baum and his successors, and the sixth written by Ruth Plumly Thompson. It was illustrated by John R. Neill.
The Giant Horse of Oz (1928) is the twenty-second in the series of Oz books created by L. Frank Baum and his successors, and the eighth written by Ruth Plumly Thompson. It was illustrated by John R. Neill.
Pirates in Oz (1931) is the twenty-fifth in the series of Oz books created by L. Frank Baum and his successors, and the eleventh written by Ruth Plumly Thompson. It was illustrated by John R. Neill.
Captain Salt in Oz (1936) is the thirtieth in the series of Oz novels created by L. Frank Baum and his successors, and the sixteenth written by Ruth Plumly Thompson. It was illustrated by John R. Neill.
Handy Mandy in Oz (1937) is the thirty-first of the Oz books created by L. Frank Baum and his successors, and the seventeenth written by Ruth Plumly Thompson. It was illustrated by John R. Neill.
Ozoplaning with the Wizard of Oz (1939) is the thirty-third in the series of Oz books created by L. Frank Baum and his successors, and the nineteenth and last written by Ruth Plumly Thompson until 1972's Yankee in Oz. It was illustrated by John R. Neill.
King Pastoria is a fictional character mentioned in the Oz books by American author L. Frank Baum. He was the rightful ruler and King of the undiscovered Land of Oz, but was mysteriously removed from his position when the Wizard of Oz unexpectedly came to the country and took the throne, proclaiming himself as the new dominant ruler of Oz. Shortly after, Pastoria's only child and heir, Princess Ozma, suddenly vanished, leaving not a single clue of her whereabouts.
Jellia Jamb is a fictional character from the classic children's series of Oz books by American author L. Frank Baum. She is first introduced in The Wonderful Wizard of Oz (1900), as the head maid who works in the royal palace of the Emerald City which is the imperial capital of the Land of Oz. In later books, Jellia eventually becomes Princess Ozma's favorite servant out of the Emerald City's staff administration. She is also the protagonist of Ruth Plumly Thompson's 1939 novel Ozoplaning with the Wizard of Oz. Her name is a pun on the phrase "Jelly or jam?"
The Red Jinn, later known as Jinnicky, is one of Ruth Plumly Thompson's most frequently occurring characters in her Oz books. According to David L. Greene and Dick Martin, he is "the most fondly remembered" of all the characters Thompson created. The Jinn is a supernatural force that lives in a large red ginger jar.
The Soldier with the Green Whiskers is a character from the fictional Land of Oz who appears in the classic children's series of Oz books by American author L. Frank Baum and his successors. He is introduced in The Wonderful Wizard of Oz (1900). His name is Omby Amby, but this was so obliquely stated that he also became known briefly as Wantowin Battles.
The Enchanted Island of Oz is a children's novel written by Ruth Plumly Thompson and illustrated by Dick Martin, and first published in 1976. The book is an entry in the series of Oz books created by L. Frank Baum and his successors. It is the last of Thompson's 21 novels about the Land of Oz. Written as a standalone novel, unrelated to Oz, around 1948, Thompson revised it as an Oz tale at the request of Oz Club president Fred Meyer.
The copyright status of The Wonderful Wizard of Oz and related works in the United States is complicated for several reasons. The book series is very long-running, and written by multiple authors, so the books often fall on opposite sides of eligibility for copyright laws. There have also been multiple adaptations across many different media, which enjoy different kinds of copyright protection. The copyright law of the United States has changed many times, and impacted Oz works every time. As of 2024, twenty-nine Oz books and five films are in the public domain. Starting in 2019, an Oz book has entered the public domain every year. Barring another extension of copyright terms, all of the Famous Forty will be in the public domain by 2059.
