Copyright status of The Wizard of Oz and related works in the United States
"The Wonderful Wizard of Oz" was published in 1900, and was the first to enter the public domain in "1956". This allowed Reilly & Lee, the publisher of all the other Oz books (as well as Baum's other books) to issue their own edition of "The Wizard of Oz", which had previously been published by George M. Hill Company and later by the Bobbs Merill Company after Hill went bankrupt..
Tik-Tok of Oz
Tik-Tok of Oz is the eighth Land of Oz book written by L. Frank Baum, published on June 19, 1914. The book actually has little to do with Tik-Tok and is primarily the quest of the Shaggy Man (introduced in "The Road to Oz") to rescue his brother, and his resulting conflict with the Nome King.