Question: Who wrote this book set in the Land of Oz in which the shite kitten Eureka is introduced?

Context paragraphs:
Glinda of Oz: Glinda of Oz is the fourteenth Land of Oz book written by children's author L. Frank Baum, published on July 10, 1920.  It is the last book of the original Oz series, which was later continued by other authors.  Like most of the Oz books, the plot features a journey through some of the remoter regions of Oz; though in this case the pattern is doubled: Dorothy and Ozma travel to stop a war between the Flatheads and Skeezers; then Glinda and a cohort of Dorothy's friends set out to rescue them.  The book was dedicated to Baum's second son, Robert Stanton Baum.

Captain Phasma: Captain Phasma is a fictional character in the "Star Wars" franchise, portrayed by Gwendoline Christie.  Introduced in "" (2015), the first film in the "Star Wars" sequel trilogy, Phasma is the commander of the First Order's force of stormtroopers. Christie confirmed that the character would reappear in the next of the trilogy's films, "".  The character also made an additional appearance in "Before the Awakening", an anthology book set before the events of "The Force Awakens".

List of Oz books: The Oz books form a book series that begins with "The Wonderful Wizard of Oz" (1900) and relate the fictional history of the Land of Oz.  Oz was created by author L. Frank Baum, who went on to write fourteen full-length Oz books.  All of the Baum written books are in the public domain in the United States.  Even while he was alive, Baum was styled as "the Royal Historian of Oz" to emphasize the concept that Oz is an actual place.  The illusion created was that characters such as Dorothy and Princess Ozma related their adventures in Oz to Baum themselves, by means of wireless telegraph.

The Scarecrow of Oz: The Scarecrow of Oz is the ninth book set in the Land of Oz written by L. Frank Baum.  Published on July 16, 1915, it was Baum's personal favorite of the Oz books and tells of Cap'n Bill and Trot journeying to Oz and, with the help of the Scarecrow, overthrowing the cruel King Krewl of Jinxland.  Cap'n Bill and Trot (Mayre Griffiths) had previously appeared in two other novels by Baum, "The Sea Fairies" and "Sky Island".

Eureka (Oz): Eureka is a white kitten found by Dorothy Gale's Uncle Henry, that he gives to her telling her that the name means "I have found it!"  She is introduced in "Dorothy and the Wizard in Oz".

Grace Gallatin Seton Thompson: Grace Gallatin Seton Thompson (1872–1959) was an American author and suffragist.  In 1900 she published her first book, "A Woman Tenderfoot", which described her trip on horseback through the Rocky Mountains.  In 1907 she published the book "Nimrod's Wife", a true hunting and travel book set in the Western United States.  She later organized and directed a women's motor unit to aid soldiers in France during the first World War.  During the 1920s and 1930s she visited China, Egypt, Hawaii, India, Indochina, Japan, and South America, and she wrote four books about her travels: "A Woman Tenderfoot in Egypt" (1923), "Chinese Lanterns" (1924), "Yes, Lady Saheb" (1925), and "Poison Arrows" (1938).  She also wrote "The Singing Traveler" (1947), a collection of poems about mysticism and eastern religions.

Adventures in Oz: Adventures in Oz is a collection of five graphic novels by Eric Shanower set in the Land of Oz.  They were originally published separately from 1986 to 1992.  The first four, "The Enchanted Apples of Oz" (1986), "The Secret Island of Oz" (1986), "The Ice King of Oz" (1987), and "The Forgotten Forest of Oz" (1988) were published by First Comics.  The fifth, "The Blue Witch of Oz", was published by Dark Horse Comics in 1992.  The hardcover edition contained an extensive appendix by Shanower about his Oz comic work, including previously unseen artwork and comics, as well as alternate endings to some stories.

Jinnicky the Red Jinn: The Red Jinn, later known as Jinnicky, is one of Ruth Plumly Thompson's most frequently occurring characters in her Oz books.  He was first introduced in "Jack Pumpkinhead of Oz" as a mysterious figure who educates Jack Pumpkinhead on the use of the Pirate Sack.  Although a detailed description is included in the text, "Jack Pumpkinhead of Oz" includes no illustrations of the Red Jinn aside from a gruesome color plate that did not appear outside the first edition, in which he has massive piercings.  He was reintroduced, drawn, and given the name Jinnicky in "The Purple Prince of Oz"; he also appeared in the follow-up, "The Silver Princess in Oz".  (He makes a cameo appearance in "The Wishing Horse of Oz", and he is the principal pre-existing character in Thompson's sub-canonical penultimate Oz book, "Yankee in Oz").  Jack Snow apparently thought the Red Jinn was a separate character, for he considered "The Purple Prince of Oz" Jinnicky's first appearance in "Who's Who in Oz", though he did not include a separate Red Jinn entry.

The Marvelous Land of Oz: 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).  This and the next 34 Oz books of the famous 40 were illustrated by John R. Neill.  The book was made into an episode of "The Shirley Temple Show" in 1960, and into a Canada/Japan co-produced animated series of the same name in 1986.  It was also adapted in comic book form by Marvel Comics, with the first issue being released in November 2009.  Plot elements from "The Marvelous Land of Oz" are included in the 1985 Disney feature film "Return to Oz".

Dorothy and the Wizard in Oz: 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.

Supporting paragraphs: Eureka (Oz) Dorothy and the Wizard in Oz
Answer: L. Frank Baum