About the book: year / Young cosmonauts Mikhail Subbotin, Alexander Makarov, Serafim Smolkin, Maya Goncharova - make up a friendly, inseparable team, nicknamed the System. The system is capable of solving the most complex technical and psychological problems both in ground-based training conditions and on the Moon. Fourth-year students at the Institute of Cosmonautics must undergo practical training. And the most enviable place was on the Moon, but it was possible to get there only by passing the most stringent selection and defeating other groups in passing a special surprise training ground, which simulated the most unusual situations that could happen to a space crew.