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Volodymyr Vynnychenko (1880-1951) was a prominent Ukrainian novelist and playwright. In the Ukrainian literature of the early twentieth century, Vynnychenko initiated the neorealism movement. He was one of the most influential political figures of his time. For many years he lived and worked in exile . The novel is set in the early 20s of the last century in Berlin. Rudolf Stor creates a fantastic "solar machine" that allows him to produce food using solar energy. The machine is a liberation for people from the usual ways of feeding themselves. To get "solar bread", you need to put grass or leaves in it and let the sunlight in, then irrigate it with sweat.

This sci-fi invention has turned people's perception of the world upside down. Habitual life has changed, and people are beginning to fight for the "solar car."