Baum had to pay for the first Oz book himself.

But the first Oz book was a big success.

Between 1921 and 1939, she wrote one Oz book a year.

I read a story to them from the Oz book.

The performances promoted each year's Oz book, and continued through the 1920s.

His set of 15 Oz books, first editions published between 1900 and 1921, is estimated to bring $9,000 to $12,000.

I'm going to borrow them- or he can't look at my Oz books.

The word "fairy" is used in several ways throughout the Oz books.

In the later Oz books, no one can die.

It was the first Oz book fully credited to her.