Tik-Tok of Oz

This book is a story about a young girl named Betsy that gets washed overboard with her mule Hank and winds up in Oz. There she encounters a Rose Princess, the Gnome King, and the Rainbow's Daughter, and Tik-Tok himself, among others. It's also the story of Ann of Oogaboo, the Queen of the smallest kingdom in Oz, who sets out on a mission with an army of thirteen officers in a bid to conquer the Emerald City.