Captain Sharki. The secret of the sunken city (12th book about the adventures of Captain Sharka and his friends)

Lose hatches! Prepare for diving!
Deep on the seabed, Captain Sharki and his friend Mikey find an ancient city, which went under water due to the eruption of the volcano. In this city there were noble wealth, but during the first immersion on the bathysphere in which friends are located, a huge sea snake attacks, and they cannot raise treasures from the bottom of the sea (this story was included in the book “Captain Sharki and Treasures of the Sea depths”)
Of course, Sharki and T -shirts are going to return to the sunken city to pick up these treasures! They again go on an underwater trip, this time - together with Captain Ramirez, who assures Sharki in his friendship and provides his submarine to travel. But is it possible to believe this captain, whom many consider to be a cunning and insidious pirate?
For secondary school age