The Oz books form a book series that begins with The Wonderful Wizard of Oz, and that relates the "history" of the Land of Oz. Oz was originally created by author L. Frank Baum, who went on to write fourteen Oz books. Although most of the Oz books are strictly adventures, Baum--as well as many later Oz authors--styled themselves as "Royal Historians" of Oz. Later authors wrote 26 other "official" books after Baum's death. Many other authors have put their own twists on Oz, notably Gregory Maguire's revisionist Wicked.Source: WikipediaAbout Lyman Frank Baum:Lyman Frank Baum (May 15, 1856 - May 6, 1919) was an American author chiefly famous for his children's books, particularly The Wonderful Wizard of Oz and its sequels. He wrote 14 novels in the Oz series, plus 41 other novels, 83 short stories, over 200 poems, and at least 42 scripts. He made numerous attempts to bring his works to the stage and the nascent medium of film; the 1939 adaptation of the first Oz book would become a landmark of 20th-century cinema. His works anticipated such century-later commonplaces as television, augmented reality, laptop computers (The Master Key), wireless telephones (Tik-Tok of Oz), women in high-risk and action-heavy occupations (Mary Louise in the Country), and the ubiquity of advertising on clothing (Aunt Jane's Nieces at Work).All "Oz" Series is available on Amazon:Series#1 The Wonderful Wizard of OzSeries#2 The Marvelous Land of OzSeries#3 Ozma of OzSeries#4 Dorothy and the Wizard in OzSeries#5 The Road to OzSeries#6 The Emerald City of OzSeries#7 The Patchwork Girl of OzSeries#8 Tik-Tok of OzSeries#9 The Scarecrow of OzSeries#10 Rinkitink in OzSeries#11 The Lost Princess of OzSeries#12 The Tin Woodman of OzSeries#13 The Magic of OzSeries#14 Glinda of OzSeries#15 The Royal Book of OzSeries#16 Abducted to OzSeries#17 Dorothy's Mystical Adventures in OzSeries#18 The Forest Monster of OzThese books have re-edited for correction of any kind of grammatical errors for your clear understanding at the time of when you read.