"Extortions of the Deep" by Frank Thomas Bullen is an exciting adventure in the depths of the ocean, where the treasures of ancient ships await their discoverer. The main character, a brave sailor, goes on a dangerous expedition to find treasures and reveal the secrets of the underwater world. Underwater ruins, treasure chests, audacity and danger are all on the reader's path in this exciting book that will bring you an unforgettable experience with every turning page.