Rinkitink in Oz is the tenth book in the Oz series written by L. Frank Baum. It was published on June 20, 1916, with full-color and black-and-white illustrations by artist John R. Neill. It is notable that most of the action takes place outside of Oz, and no character from Oz appears in the book until its climax; this is due to Baum's having originally written most of the book as a fantasy novel unrelated to his Oz books over ten years earlier, in 1905.

Lyman Frank Baum was an American author best known for his children's fantasy books, particularly The Wonderful Wizard of Oz, part of a series. In addition to the 14 Oz books, Baum penned 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 screen; the 1939 adaptation of the first Oz book became a landmark of 20th-century cinema.