The secret of two oceans. The winners of the subsoil

"The secret of the two oceans". The 1930s are the eve of World War II and conflicts with Japan. The latest submarine "Pioneer" goes from Leningrad to Vladivostok to strengthen the Pacific Fleet. Soviet sailors have to withstand not only a familiar enemy: Japanese warships and saboteurs who had been introduced into the crew, but also by oceanic elements and unknown monsters, which were considered extinct millions of years ago. The military transition turns into an amazing journey through a completely unfamiliar and mysterious underwater world.
"Winners of the subsoil". There is a project - to create a thermoelectric station at a more than ten -kilometer depth, which, working from the heat of the Earth, would provide people with an inexhaustible source of energy. For the sake of its implementation, four daredevils in a special apparatus are sent on an underground expedition.
Grigory Adamov is one of the most popular Soviet fantasy writers. His novels have not only fascinating plots, but also significant information about the then achievements of science and technology, which makes them especially interesting