About the book: year / On the planet Arneb 3, fate brings Kratov, who maintains galactic lighthouses, with his childhood friend Elena Klimova, who became the commander of the Star Patrol. And then his adventures on the crazy planet Uerkaf finally lead him to the idea of ​​returning to society and changing his profession. Kratov sees the work of xenologists up close and participates in it himself to the best of his ability. He understands: this is his calling.