dragon masters - book 4 - power of the fire dragon

This series is part of Scholastic's early chapter book line called Branches, which is aimed at newly independent readers. With easy-to-read text, high-interest content, fast-paced plots, and illustrations on every page, these books will boost reading confidence and stamina. Branches books help readers grow! The Dragon Masters are going to visit Queen Rose's kingdom. But Rori and Drake must stay behind. Then a four-headed dragon attacks the castle--and Maldred is riding it! How is Maldred controlling this giant dragon? Will Rori and Drake have to battle the dark wizard on their own?