Green chains. Matveev G.

The first book of the Tarantula trilogy.

1941. Around Leningrad, the blockade ring is compressed, the fascist invaders are trying to break through the defense and take the city. During artillery raids, green missiles suddenly soar into the Leningrad sky, with which enemy accomplices indicate the goals for bombing - important objects of the city. Ordinary Leningrad boys help to find and neutralize spies to employees of the State Security Committee.