The city of dragons. The book is third

You are in the claws of the city of dragons!
Feel a steel grip? Feel growing horror? Ready to challenge those who are stronger and more powerful? The blizzard will fierce over Westernadan, a furious wind sweeps dust from the ancient tombs, exposing the forgotten legends, and the murderous past no longer wants to hide in the bowels of the iron mountain. How did dragons appear? What awaits them? And why is the authorities involved in all this?
A student of Professor Stonton stubbornly seeks answers to the questions that have become vital. Anabel is faced with a difficult task - under the guise of servants to penetrate the residence of Arnels, find the way into a family crypt, decipher the message of his ancestors and, most importantly, not getting to the dragon, who does not suit at all that his object of passion risks himself.
Miss Anabel Waerti continues his dangerous investigation