About the book: 2017 / In the distant future, flights in co-space in which matter turns into antimatter have become possible. For inexplicable reasons, the Whale spaceship and its entire crew did not change sign when exiting co-space—they did not return to the state of matter. And now they are forced to look for a way out of this situation. They cannot return to Earth, as this threatens the planet with destruction... Illustration on the cover by S. Shikin; internal illustrations by G. Gonkov.