The Secret Order of the Gumm Street Girls by Elise Primavera

For seven years, bad luck has followed Ivy around like a dog on a leash. Her father disappeared, her mother is a washed–up beauty–pageant winner, and now Viola and her mother have moved into a raqmshackle house on Gumm Street. Ivy's new neighbors–bookish Pru, stuck–up Cat, and wannabe adventurer Franny–are worse than unfriendly. But then a mysterious pair of ruby red slippers turn up, and the four girls are swept away...not to OZ, but to the jaw–droppingly strange lands of SPOZ, and SPUDZ, and OOZE, pursued by the fashionably mad Cha–Cha Staccato, who bears a frightening resemblance to a certain wicked witch....

Ages: 8 –12