A great discovery that could change the future of humanity has not been given any progress... The exploration of an incredible planet, among whose mineral resources there are metals that do not exist on Earth, has been stopped for some unknown reason... Earthlings find themselves in a world in which fear, pain, horror, and disappointment are prohibited ... The heroes find themselves in a twelve-dimensional Universe, where earthly physics is not applicable, but human thoughts and feelings are understandable... The five stories included in the final volume of the collected works of the classic of Russian science fiction are dedicated to the most incredible fantastic events - both the above and many others.