Ships, or "Help me on the way...". Krapivin V.P.

In the famous choir of the boys of the city of Byzantine, young singers disappear: they will perform once or twice and disappear. It is not known how long this would have continued if one day the main character of the novel, a scientist, a specialist in the inter -spatial vacuum, returning from a long business trip, accidentally did not get to the concert and did not recognize himself in the soloist, twelve years old. For secondary and senior school age.