Nur y el Templo del Dragón

In this third book, Nur has moved with his parents to China, where he makes some new friends. To celebrate the birthday of his new friend Guo Guo, they all meet at a big theme park. Once there, they realise that Guo Guo has disappeared. In the search for their friend they go into a maze and will have to solve several enigmas in order to go through the nine dragon doors they come across.