Mary Pope Osborne 
Magic Tree House 14: Palace of the Dragon King 

For this adventure, Jack and Annie are in Ancient China!When the tree house lands in ancient China, Jack and Annie are told to beware the fearsome emperor . . . It’s not long before they learn the warning is right! In search of an old Chinese legend, they head to the palace of the dragon king. But he is not pleased to see them! And when they find themselves lost in his spooky burial grounds, only magic will help Jack and Annie escape!