Rinkitink in Oz

Rinkitink in Oz, written by L. Frank Baum and first published in 1916, is the tenth book in the Oz series. Originally conceived as a standalone fantasy in 1905, it follows Prince Inga on his quest to rescue his parents after their island home is attacked. Accompanied by the jovial King Rinkitink and his goat Bilbil, Inga's journey takes him to the Nome King's underground caverns, where he seeks the help of Oz inhabitants to reclaim his kingdom. This book expands the Oz universe beyond its borders, exploring neighboring fairy countries.