First published in 1908, Dorothy and the Wizard in Oz is the fourth book in L. Frank Baum's Land of Oz books. The Wonderful Wizard of Oz is without a doubt the most commonly sought book of the series, but any books in the series (or indeed, by L. Frank Baum at all) are highly collectible, and Dorothy and the Wizard in Oz is no exception.
Dorothy and the Wizard in Oz has the distinction of being only one of two books in the series to receive full-color watercolor illustrations in its original printing. 16 color plates illustrated by John R. Neill make this book a beautiful addition to any collector's bookshelf.
Signed first edition copies of Dorothy and the Wizard in Oz are very rare, and generally go to auction instead of being offered for sale for a flat price. The most recent auction of this type was in 2004, in which the book sold for $5,700 despite having some staining and damage. However, this is not the most expensive copy of this book -- even newer copies can easily sell for twice that if signed by the cast of the cult classic Wizard of Oz movie, despite the movie only being based on the first book in the series.
Collectors on a smaller budget can also get their hands on collectible copies of this book, though generally without the cost-prohibitive signature. First editions of Dorothy and the Wizard in Oz can run up to over a thousand dollars if in very good condition, especially if the rare dust jacket is still attached, but in many cases a first edition can be obtained for only a few hundred dollars. The popularity of the series also led to numerous reprints, many of them early enough that they are considered antiques even if not first edition, and so can sell for $100 or more if in fine condition.