From the publisher:
Having escaped the evil witch Mombi, Tip and his friends set out into the Land of Oz to meet the Scarecrow, Ruler of the Emerald City. However, General Jinjur and her Army of Revolt have seized power, and it will take more than the Soldier with the Green Whiskers to return the throne to its rightful owner. But who is the true heir to Oz, and where in the world could they be?