Here is a lot of 4 paperback Wizard of Oz books from Emerald City Press, published in the 1990s. Includes The Glass Cat of Oz by David Hulan, Masquerade in Oz by Bill Campbell and Irwin Terry, Queen Ann in Oz by Karyl Carlson and Eric Gjovaag, and Christmas in Oz by Robin Hess. They are illustrated in B&W. Christmas in Oz has a personal 1994 inscription by the author.
In good condition but do appear read, with some edge wear, particularly to Glass Cat. Hard to find titles, with Glass Cat and Queen Ann starting at $20 each on Abebooks, and Christmas and Masquerade not available at all! Here just $12 each.