'The Wonderful Wizard of Oz' was an innovative book not least because of the twenty four full colour plates and myriad monochromatic illustrations in which the colour changed according to the location in the story (Kansas = grey, Emerald City = green and so on). With the illustrative vignettes often encroaching on the text area, the type was cleverly printed over the top of the coloured images. Such elaborate printing techniques again required that Baum and Denslow fund the printing costs and the book was published by George M Hill and Company of Chicago and New York in 1900 for $1.50 per copy. It was apparently successful.